
Expert pH Pocket Tester
SKU: N/AExpert pH Pocket Tester is designed for on-the-go measurements of pH and temperature. The Expert pH Pocket Tester is best used in applications such as hydroponic gardening, aquaculture, agriculture, pools, cooling towers, and more!
Simultaneously measure pH and temperature with the Thermo Scientific Eutech Expert pH testers, a pocket sized tester designed to provide accurate measurements on the go for a variety of applications, including hydroponic gardening, aquaculture, agriculture, pools, lab work, and other water applications.
- Auto-buffer recognition and auto-calibration make on-site calibration quick and easy
- 3-point calibration allows the tester to accurately measure pH across the acid and alkali ranges
- ±0.1% accuracy
Applications
- Hydroponics
- Agriculture
- Aquaculture & Aquariums
- Pools & Spas
- Education
- Cooling Towers
- Water Treatment
- Environmental Monitoring
- Food & Beverage Manufacturing
- Printing and more!
General Specifications | |
Display Type | 4-Digit, Double-Line |
Includes | Expert pH tester with batteries |
Range (pH) | 0.0 to 14.0 pH |
Resolution (pH) | 0.1 pH |
Accuracy (pH) | ±0.1 pH |
Temperature Compensation | Yes |
Calibration | pH, temperature |
Calibration Points | 1 to 3 pH points |
Resolution (Temperature) | 0.1°C, 0.1°F |
Accuracy (Temperature) | ±0.6°C, ±1.0°F |
Temperature Probe Calibration | 1 point |
Display Type | 4-digit, double-line |
Backlight Option | No |
Measurement Modes | pH, temperature |
Battery Life | 100 hours (average) |
Battery Type | 4 x 1.5V Micro Alkaline |
IP Rating | IP-67 |
Certifications/Compliance | CE, FCC Class A, ROHS-2 |
Temperature (English) Operating | 32.0° to 122.0°F |
Temperature (Metric) Operating | 5° to 45° C (ambient) |
Relative Humidity Range | 5 to 85%, non-condensing |
Weight (English) | 3.4 oz. |
Weight (Metric) | 96.3 g |
Accuracy | ±0.1 pH |
Height (English) | 1.2 in. |
Height (Metric) | 3cm |
Length (English) | 6.7 in. |
Length (Metric) | 17cm |
Resolution | 0.1pH |
Temperature (English) Range | 32.0° to 140.0°F |
Temperature (Metric) Range | 0.0° to 60.0°C |
Width (English) | 1.8 in. |
Width (Metric) | 4.5cm |
Warranty | 1 year |
Unit Size | Each |

YSI EconSense pH100M pH Meter with Extended Memory
SKU: N/AKey Features
- Waterproof micro-USB port for transferring data to PC; no software required
- Holds 250 data sets; no need to write down data
- Real-time clock for date/time stamp of saved data
- User-selectable recalibration prompt provides reminder to calibrate
- Automatic buffer recognition (US or NIST buffer sets)
- Auto/Manual temperature compensation
- IP-67 waterproof housing
- 1-year instrument warranty; 6-month electrode warranty
- 1 and 4-meter field cables available; lab pH and ORP electrodes also available
- Autolock mode holds stable readings on display
- Low battery indicator with 150 hour battery life
- Auto shutoff function after 30 minutes of inactivity
- Displays electrode efficiency
Specifications
Autostable | Autolock mode holds stable readings on display |
---|---|
Buffer Recognition | Yes, pH 7.00, 4.01, 10.01 or pH 6.86, 4.00, 9.18 |
Equipment used with | 100-1, 100-4, 110-1, 111-1, 112-1, 115-1, and 130-1 probes |
Measurement Method / Channels | 1 BNC input for pH or mV; 1 input for temperature |
Measurement Range | pH: -2.00 to 16.00 pH units mV: -1999.9 to 1999.9 |
Operating Temperature | 0 to 50° C (32 to 122 °F) |
Parameters Measured | pH, mV (ORP), Temperature |
User Calibratable | Yes; 2-point calibration |
User Replaceable | Yes, probes can be replaced |
Warranty | 1-year instrument, 6-month electrode |

YSI EcoSense DO200A Dissolved Oxygen Meter
SKU: N/AKey Features
- 1-year instrument, DO electrode and cable warranty
- IP67 waterproof rating
- Screw-on cap membrane
- Low battery indicator with 500 hour battery life
- Automatic shutoff after 30 minutes of inactivity
- Salinity, pressure and temperature compensation
- CE compliance
- 1-, 4- or 10-meter cable lengths available; BOD probe available
- 50 data set reviewable memory
Specfications
Certifications | IP67 Waterproof |
---|---|
Languages | English |
Measurement Range | Dissolved Oxygen % air saturation-0 to 200% Dissolved Oxygen ppm (mg/L)- to 20 mg/L |
Memory | 50 data set reviewable memory |
Multiparameter | Yes |
Operating Temperature | 0 to 50° C (32 to 122 °F) |
Parameters Measured | Dissolved Oxygen, Temperature |
Sampling | Yes |
Unit of Measure | %, mg/L, air saturation |
User Calibratable | Yes |
User Replaceable | Yes |
Warranty | 1-year instrument, probe and sensor cap |
Waterproof | IP67 Waterproof |

YSI EcoSense DO200M Dissolved Oxygen Meter with Extended Memory
SKU: N/AKey Features
- Waterproof micro-USB port for transferring data to PC; no software required
- Holds 250 data sets; no need to write down data
- Real-time clock for date/time stamp of saved data
- User-selectable recalibration prompt provides reminder to calibrate
- IP-67 waterproof housing
- Automatic temperature compensation; manual input for salinity and pressure compensation
- 1-year instrument and probe warranty
- 1-, 4- and 10-meter field cables available; lab self-stirring BOD probe also available
- Low battery indicator with 150 hour battery life
- Screw-on cap membranes with fast response and low-stirring requirement
- Auto shutoff function after 30 minutes of inactivity
Specifications
Measurement Range | Dissolved Oxygen % air saturation: 0 to 200%; Dissolved Oxygen mg/L: 0 to 20 mg/L |
---|---|
Memory | 250 data set reviewable memory |
Operating Temperature | 0 to 50 °C (32 to 122 °F) |
Parameters Measured | Dissolved Oxygen, Temperature |
Power | One 9V battery (included) |
Sampling | Yes |
Unit of Measure | % air saturation, mg/L |
User Calibratable | Yes |
User Replaceable | Yes |
Warranty | 1-year instrument and probe/cable assembly |
Waterproof | IP67 Waterproof |

YSI EcoSense EC300A Conductivity Meter
SKU: N/AKey Features
- 1-year instrument, electrode and cable warranty
- IP67 waterproof rating
- Rugged weighted probe assembly; super-stable electrode designed for field use
- Automatic temperature compensation
- Low battery indicator with 500 hour battery life
- Automatic shutoff after 30 minutes of inactivity
- 1-, 4- or 10-meter cable lengths available
- CE compliance
- 50 data set memory
Specifications
Certifications | IP67 Waterproof |
---|---|
Languages | English |
Measurement Range | Conductivity-0 to 499.9 µS/cm, 0 to 4999 µS/cm, 0 to 49.99 mS/cm, 0 to 200.0 mS/cm Salinity-0.0 to 70.0 ppt, calculated TDS (Total Dissolved Solids)-TDS in g/L calculated; enter constant values from 0.30 to 1.00, default value 0.65 Temperature- -10 to +90°C (14 to 194°F) |
Memory | 50 data set reviewable memory |
Multiparameter | Yes |
Operating Temperature | 0 to 50° C (32 to 122 °F) |
Parameters Measured | Conductivity, Salinity, TDS, Temperature |
Sampling | Yes |
Unit of Measure | mS/cm Salinity- ppt TDS-g/L Temperature- °C, Conductivity- µS/cm, °F |
User Calibratable | Yes |
User Replaceable | Yes |
Warranty | 1-year instrument, probe and sensor cap |
Waterproof | IP67 Waterproof |

YSI EcoSense EC300M Conductivity Meter with Extended Memory
SKU: N/AKey Features
- Waterproof micro-USB port for transferring data to PC; no software required
- Holds 250 data sets; no need to write down data
- Real-time clock for date/time stamp of saved data
- User-selectable recalibration prompt provides reminder to calibrate
- Automatic temperature compensation
- IP-67 waterproof housing
- 1-year instrument and probe/cable assembly warranty
- 1-, 4- and 10-meter durable field cables available
- Auto shutoff function after 30 minutes of inactivity
- Super-stable, four-electrode conductivity cell designed for the field
Specifications
Measurement Range | Conductivity: 0 to 200.0 mS/cm; Salinity: 0.0 to 70.0 ppt; Total Dissolved Solids (TDS): Calculated in mg/L; Temperature: -10 to +90°C (14 to 194°F) |
---|---|
Memory | 250 data set reviewable memory |
Operating Temperature | 0 to 50° C (32 to 122 °F) |
Parameters Measured | Conductivity, Salinity, TDS, Temperature |
Sampling | Yes |
Unit of Measure | Conductivity: mS/cm or µS/cm; Salinity: ppt; Total Dissolved Solids (TDS): mg/L; Temperature: °C |
User Calibratable | Yes |
User Replaceable | Yes |
Warranty | 1-year instrument and probe/cable assembly |
Waterproof | IP67 Waterproof |

YSI EcoSense EC30A Conductivity Pen
SKU: N/AKey Features
- IP-67 waterproof housing
- 1-year instrument warranty
- Automatic temperature compensation
- User-replaceable electrodes
- 1- or 2-point calibration
- Clear, easy-to-read display with on-screen instructions
- Selectable units of measure for conductivity, TDS and temp
- Selectable or auto-ranging for conductivity or TDS
- ”Hold” feature locks readings on display
- >200 hour battery life; low battery indicator
- Last calibration GLP record
Specifications
Certifications | IP67 Waterproof |
---|---|
Languages | English |
Measurement Range | Conductivity-0.0 µS to 19.90 mS, with manual or auto ranging Temperature: 0.0 to 99.5 °C (32.0 to 212 °F) |
Memory | None |
Multiparameter | Yes |
Operating Temperature | 0 to 50° C (32 to 122 °F) |
Parameters Measured | Conductivity, Temperature |
Sampling | Yes |
Unit of Measure | mS/cm Temperature- °C, °F, Conductivity- µS/cm |
User Calibratable | Yes |
Warranty | 1-year instrument, electrode |
Waterproof | IP67 Waterproof Case |

YSI EcoSense ODO200 Optical Dissolved Oxygen and Temperature Meter
SKU: N/AKey Features
- Automatic temperature compensation
- 1-year instrument, cable and sensor cap warranty
- 1-, 4- and 10-meter durable field cables available
- Manual input for salinity and pressure compensation
- Low battery indicator with 100 hour battery life
- Replaceable optical sensor cap (12-18 month life)
- Auto shutoff function after 30 minutes of inactivity
- 50 data set reviewable memory
- IP67 waterproof rating
Specifications
Certifications | IP67 waterproof, CE, WEEE, RoHS |
---|---|
Languages | English |
Measurement Range | Dissolved Oxygen % air saturation-0 to 200% Dissolved Oxygen ppm (mg/L)- to 20 mg/L |
Memory | 50 data set reviewable memory |
Multiparameter | Yes |
Operating Temperature | 0 to 50° C (32 to 122 °F) |
Parameters Measured | Dissolved Oxygen, Temperature |
Sampling | Yes |
Unit of Measure | air saturation, mg/L, % |
User Calibratable | Yes |
User Replaceable | Yes |
Warranty | 1-year instrument, probe and sensor cap |
Waterproof | IP67 Waterproof |

YSI EcoSense ODO200M Optical Dissolved Oxygen and Temperature Meter with Extended Memory
SKU: N/AKey Features
- Waterproof micro-USB port for transferring data to PC; no software required
- Holds 250 data sets; no need to write down data
- Real-time clock for date/time stamp of saved data
- User-selectable recalibration prompt provides reminder to calibrate
- Automatic temperature compensation; manual input for salinity and pressure compensation
- IP-67 waterproof housing
- Replaceable optical sensor cap with 12-18 month life
- 1-year instrument, probe/cable and sensor cap warranty
- 1-, 4- and 10-meter durable field cables available
- Auto shutoff function after 30 minutes of inactivity
Specifications
Measurement Range | Dissolved Oxygen air saturation: 0 to 200%; Dissolved Oxygen mg/L: 0 to 20 mg/L; Temperature: 0 to 50 °C (32 to 122 °F) |
---|---|
Memory | 250 data set reviewable memory |
Operating Temperature | 0 to 50° C (32 to 122 °F) |
Parameters Measured | Dissolved Oxygen, Temperature |
Sampling | Yes |
Unit of Measure | air saturation (%), mg/L, °C |
User Calibratable | Yes |
User Replaceable | Yes |
Warranty | 1-year instrument, probe/cable and sensor cap |
Waterproof | IP67 Waterproof |

YSI EcoSense ORP15A ORP Temperature Pen Tester
SKU: N/AKey Features
- Waterproof IP-67 case
- 1-year warranty; 6-month electrode warranty
- Absolute and relative readings
- Replaceable electrodes
- 50-set memory
- Low battery indicator
- Hold feature locks readings on display
- CE compliance
- >200 hour battery life with low battery indicator
Specifications
Certifications | IP67 Waterproof |
---|---|
Languages | English |
Measurement Range | ORP–1100 to +1100 units Temperature–10 to 100 °C (14.0 to 212 °F) |
Memory | Non-volatile, 50 sets (absolute and relative ORP, temperature, date and time stamp), erase all data function |
Multiparameter | Yes |
Operating Temperature | 0 to 50° C (32 to 122 °F) |
Parameters Measured | ORP, Temperature |
Sampling | Yes |
Unit of Measure | °F, ORP- unit, Temperature: °C |
User Calibratable | Yes |
User Replaceable | Yes |
Warranty | 1-year instrument; 6-months electrode |
Waterproof | IP-67 waterproof case |

YSI EcoSense pH/EC1030A pH and Conductivity Pen
SKU: N/AKey Features
- IP-67 waterproof housing
- 1-year instrument, 6-month electrode warranty
- Automatic temperature compensation
- Easily switch between °C and °F
- Clear, easy-to-read graphic LCD display
- Auto shut-off feature
- Replaceable pH and conductivity electrode
- ”Hold” feature locks readings on display
- 50 data-set memory
- >100 hour battery life and low battery indicator
- CE compliant
Specifications
Certifications | IP67 Waterproof, CE |
---|---|
Languages | English |
Measurement Range | pH: 0.00 to 14.00 pH units Conductivity: 0 µS/cm to 20.00 mS/cm TDS: 0 mg/L to 20.00 g/L Salinity: 0.0 to 10.0 ppt |
Memory | 50-set memory (pH/Conductivity/TDS/Salinity and temperature) |
Multiparameter | Yes |
Operating Temperature | 0 to 50° C (32 to 122 °F) |
Parameters Measured | pH, Conductivity, TDS (Total Dissolved Solids), Salinity, Temperature |
Sampling | Yes |
User Calibratable | Yes |
User Replaceable | Yes, replaceable pH and conductivity electrode |
Warranty | 1-year instrument, 6-month electrode |
Waterproof | IP67 Waterproof Case |

YSI EcoSense pH100A pH Meter
SKU: N/AKey Features
- 1-year instrument warranty
- IP67 waterproof housing
- Internal buffer recognition
- Auto or manual temperature compensation
- CE compliance
- Sensors are available as single parameter or combinations
- for pH or mV and temperature
- Low battery indicator with 1000 hour battery life
- Electrode offset recognition
- Autolock mode holds stable readings on display
- Displays electrode efficiency
- 50 data set memory
Specifications
Certifications | IP67 Waterproof |
---|---|
Languages | English |
Measurement Range | pH: -2 to 16 units mV: -1999 to +1999 mV Temperature: -10 to +120°C (14 to 248°F) |
Memory | 50 data set reviewable memory |
Multiparameter | Yes |
Operating Temperature | 0 to 50° C (32 to 122 °F) |
Parameters Measured | pH, mV/ORP, Temperature |
Sampling | Yes |
Unit of Measure | °F, mV, pH- unit, Temperature: °C |
User Calibratable | Yes |
User Replaceable | Yes |
Warranty | 1-year instrument, 6-month electrode |
Waterproof | IP67 Waterproof Case |

YSI EcoSense pH10A pH Pen Tester
SKU: N/AKey Features
- Waterproof IP-67
- 1-year warranty
- Automatic calibration and buffer recognition
- 50-set memory (pH, temp, date and time stamp)
- Replaceable single- or double-junction electrode
- GLP functionality
- 1-, 2-, or 3-point calibration
- Hold feature locks stable readings on the display
- CE compliance
- >200 hour battery life with low battery indicator
Specifications
Certifications | IP67 Waterproof |
---|---|
Languages | English |
Measurement Range | pH-0.00 to 14.00 units Temperature- |
Memory | temp, date and time stamp), 50-set memory (pH |
Multiparameter | Yes |
Operating Temperature | 0 to 50° C (32 to 122 °F) |
Parameters Measured | pH, Temperature |
Sampling | Yes |
Unit of Measure | pH- unit, °F, Temperature: °C |
User Calibratable | Yes |
User Replaceable | Yes |
Warranty | 1-year instrument, 6-month electrode |
Waterproof | IP67 Waterproof Case |

YSI Pro10 pH or ORP Instrument
SKU: N/AKey Features
- User-replaceable cables and sensors provide versatility, reduce down time and reduce overall cost of ownership.
- Available with 1- 4- 10- 20- and 30-m cable lengths standard (cable management kit included on all cables 4-m and longer).
- Smart calibration; the instrument remembers the previous calibration values and simply walks you through the routine.
- Stores 50 data sets; no need to write down data.
- Large graphic, backlit display and glow in the dark keypad. Usable in any lighting condition. The display is also visible when wearing polarized sunglasses.
- Tough. IP67, impact-resistant, waterproof case. Waterproof without the battery cover as well.
- Rubber over molded case provides extra durability. Military spec connectors are unsurpassed for ruggedness.
- Multiple languages include English, Spanish, French, and Portuguese.
- 3-year instrument; 2-year cable; 1-year sensor warranty
Specifications
Certifications | RoHS, 1-meter drop test, Assembled in USA, IP-67, CE, WEEE |
---|---|
Connector | MS (military spec) waterproof with bayonet lock |
Digital / Digital Sensors | Analog |
Equipment used with | ProSeries 10-x, 1007-x and 1008-x |
Graphic Display | Graphic display with detailed Help, backlit display AND keypad |
Languages | English, French and Portuguese, Spanish |
Logging Capabilities | Single |
Measurement Range | pH: -2 to 14 units Temperature: -5 to 55°C ORP: -1500to +1500 mV Temperature: -10 to +120°C (14 to 248°F) |
Memory | 50 data sets |
Multiparameter | Yes |
Operating pH Range | 0 to 14 units |
Parameters Measured | Temperature, pH, ORP |
Power | 2 alkaline C-cells provide 425 continuous hours at ambient temperature without backlight |
Sampling | Yes |
Unit of Measure | ORP- mV, Temperature- °C, pH-unit |
User Calibratable | Yes |
User Replaceable | Yes |
Warranty | 3-year instrument; 2-year field cables |
Waterproof | IP-67 (even with the battery cover off), floats |

YSI Pro1020 Dissolved Oxygen and pH or ORP Instrument
SKU: N/AKey Features
- User-replaceable cables and sensors provide versatility, reduce down time and reduce overall cost of ownership.
- Available with 1- 4- 10- 20- and 30-m cable lengths standard (cable management kit included on all cables 4-m and longer).
- Smart calibration; the instrument remembers the previous calibration values and simply walks you through the routine.
- Stores 50 data sets; no need to write down data.
- Large graphic, backlit display and glow in the dark keypad. Usable in any lighting condition. The display is also visible when wearing polarized sunglasses.
- Tough. IP67, impact-resistant, waterproof case. Waterproof without the battery cover as well.
- Rubber over molded case provides extra durability. Military spec connectors are unsurpassed for ruggedness.
- Multiple languages include English, Spanish, French, and Portuguese.
- Choose either polarographic or galvanic DO sensors.
- Quick response times; 95% DO response time in approximately 8 seconds with standard membrane (fastest response time in the market).
- 3-year instrument; 2-year cable; 1-year sensor warranty (Galvanic DO is 6-months)
Specifications
Certifications | IP-67, 1-meter drop test, CE, Assembled in USA, RoHS, WEEE |
---|---|
Connector | MS (military spec) waterproof with bayonet lock |
Digital / Digital Sensors | Analog |
Equipment used with | ProSeries 1020-x cables |
Graphic Display | backlit display AND keypad, Graphic display with detailed Help |
Languages | English, German, Spanish, French |
Logging Capabilities | Single |
Measurement Range | pH-0 to 14 units ORP–1500 to 1500 mV Dissolved Oxygen-0 to 500% air saturation, 0 to 50 mg/L Temperature–5 to 55°C |
Memory | 50 data sets |
Multiparameter | Yes |
Parameters Measured | Dissolved Oxygen, pH, ORP, temperature |
Power | 2 alkaline C-cells provide 425 continuous hours at ambient temperature without backlight |
Sampling | Yes |
Unit of Measure | Temperature-°C, ORP-mV, pH-units, mg/L, Dissolved Oxygen % air saturation |
User Calibratable | Yes |
User Replaceable | Yes |
Warranty | 3-year instrument; 2-year field cables |
Waterproof | floats, IP-67 (even with the battery cover off) |

YSI Pro1030 pH or ORP, Conductivity, Salinity Instrument
SKU: N/AKey Features
- Smart calibration routine allows easy calibrations with the press of a button, remembers previous cal values and simply walks you through the calibration
- Stores 50 data sets
- Graphic, backlit display and glow in the dark keypad
- Available with 1, 4, 10, 20, or 30-meter cables (4-meter and longer cables include cable management kit)
- View display with polarized sunglasses on
- Multiple languages include English, Spanish, French and Portuguese
- User replaceable pH or ORP sensors and cables
- Conductivity cell built-in
- 3-year instrument; 2-year cable warranty; 1-year pH and ORP sensor warranty
Specifications
Certifications | CE, WEEE, IP-67, 1-meter drop test, RoHS, Assembled in USA |
---|---|
Connector | MS (military spec) waterproof with bayonet lock |
Digital / Digital Sensors | Analog |
Equipment used with | ProSeries 1030-x cables |
Graphic Display | Graphic display with detailed Help, backlit display AND keypad |
Languages | Spanish, English, German, French |
Logging Capabilities | Single |
Measurement Range | pH- 0 to 14 units ORP-1500 to 1500 mV Conductivity- 0 to 500 mS/cm Salinity-0 to 70 ppt Total Dissolved Solids (TDS)-0 to 100 g/L TDS constant range .30 to 1.00 (.65 default) Temperature–5 to 55°C |
Memory | 50 data sets |
Multiparameter | Yes |
Parameters Measured | ph, ORP, salinity, conductivity, specific conductance, Total Dissolved Solids (TDS), temperature |
Power | 2 alkaline C-cells provide 425 continuous hours at ambient temperature without backlight |
Sampling | Yes |
Unit of Measure | Salinity-ppt, pH-units, Conductivity-mS, ORP-mV, Total Dissolved Solids (TDS)-g/L, Temperature-°C |
User Calibratable | Yes |
User Replaceable | Yes |
Warranty | 3-year instrument; 2-year field cables |
Waterproof | floats, IP-67 (even with the battery cover off) |

YSI Pro20 Dissolved Oxygen Instrument
SKU: N/AKey Features
- Internal barometer for highest accuracy
- Choose field DO sensors (Polarographic or Galvanic) or lab BOD probe for BOD in wastewater
- One Touch Cal calibrates within 3 seconds with the push of a button
- Stores 50 data sets
- Graphic, backlit display and glow in the dark keypad
- Available with 1, 4, 10, 20, 30 or 100-meter cables
- View display with polarized sunglasses on
- Fastest response time on the market with 95% response in 8 seconds with standard membrane
- Multiple languages include English, Spanish, French and German
- User replaceable sensors and cables
- 3-year instrument; 2-year cable warranty
Specifications
Certifications | IP-67, RoHS, Assembled in USA, CE, 1-meter drop test, WEEE |
---|---|
Connector | MS (military spec) waterproof with bayonet lock |
Digital / Digital Sensors | Analog |
Equipment used with | ProSeries 20-x cables, ProBOD |
Graphic Display | backlit display AND keypad, Graphic display with detailed Help |
Languages | English, Spanish, French, German |
Logging Capabilities | Single |
Measurement Range | 0 to 500%; 0 to 50 mg/L |
Memory | 50 data sets |
Multiparameter | Yes |
Parameters Measured | Temperature, Dissolved Oxygen, Built-in barameter |
Power | 2 alkaline C-cells provide 450 continuous hours at ambient temperature without backlight |
Sampling | Yes |
Unit of Measure | air saturation, mg/L, Barameter-mmHg, °F, Temperature- °C, Dissolved Oxygen-% |
User Calibratable | Yes |
User Replaceable | Yes |
Warranty | 3-year instrument; 2-year field cables |
Waterproof | floats, IP-67 (even with the battery cover off) |

YSI Pro2030 Dissolved Oxygen, Conductivity, Salinity Instrument
SKU: N/AKey Features
- Internal barometer for highest accuracy
- Choose field DO sensors (Polarographic or Galvanic)
- Quick Cal allows DO calibrations within seconds with the push of a button
- Stores 50 data sets
- Graphic, backlit display and glow in the dark keypad
- Available with 1, 4, 10, 20, or 30-meter cables (4-meter and longer cables include cable management kit)
- View display with polarized sunglasses on
- Fastest DO response time on the market with 95% response in 8 seconds with standard membrane
- Multiple languages include English, Spanish, French and German
- User replaceable DO sensors and cables •Conductivity cell built-in
- 3-year instrument; 2-year cable warranty
Specifications
Certifications | CE, RoHS, Assembled in USA, IP-67, WEEE, 1-meter drop test |
---|---|
Connector | MS (military spec) waterproof with bayonet lock |
Digital / Digital Sensors | Analog |
Equipment used with | ProSeries 2030-x cables |
Graphic Display | backlit display AND keypad, Graphic display with detailed Help |
Languages | French, English, Spanish, German |
Logging Capabilities | Single |
Measurement Range | Dissolved Oxygen % air saturation- 0 to 500% air saturation Dissolved Oxygen (mg/L)-0 to 50 mg/L Conductivity-0 to 200 mS/cm Salinity-0 to 70 ppt Total Dissolved Solids (TDS)-0 to 100 g/L TDS constant range .30 to 1.00 (.65 default) Temperature–5 to 55°C Barometer-500 to 800 mmHg |
Memory | 50 data sets |
Multiparameter | Yes |
Parameters Measured | Dissolved Oxygen, Conductivity, Salinity, Total Dissolved Solids (TDS), Temperature, Barometer |
Power | 2 alkaline C-cells provide 400 continuous hours at ambient temperature without backlight |
Sampling | Yes |
Unit of Measure | Temperature-°C, mg/L, Total Dissolved Solids (TDS)-g/L, Conductivity-mS./cm, Salinity-ppt, Dissolved Oxygen-% air saturation, Barometer-mmHg |
User Calibratable | Yes |
User Replaceable | Yes |
Warranty | 3-year instrument; 2-year field cables, 1-year Polarographic sensors, 6-months Galvanic |
Waterproof | floats, IP-67 (even with the battery cover off) |

YSI Pro20i Dissolved Oxygen Instrument
SKU: N/AKey Features
- Integral (i.e. built-in) cable with 1- 4- 10-m field cable; user-replaceable DO sensors
- One Touch Cal allows for easy DO calibrations within 3 seconds with the press of a button. Automatic barometric pressure compensation.
- Quick response times; 95% response time in approximately 8 seconds with standard membrane (fastest response time on the market)
- Stores 50 data sets; no need to write down data
- Large graphic, backlit display and glow in the dark keypad
- A true field instrument – the display is visible when wearing polarized sunglasses
- Tough. IP-67, impact-resistant, waterproof case. Waterproof with and without the battery cover
- Rubber over molded case provides extra durability
- Multiple languages: English, Spanish, French, and German
- 3-year instrument; 2-year integral cable; 1-year polarographic sensors; 6-month galvanic sensor warranty
Specifications
Cable Options | 1- 4- 10-m lengths (3.28, 13.1, 32.8 ft.) |
---|---|
Certifications | RoHS, CE, WEEE, IP-67 waterproof, 1-meter drop test |
Languages | English, Spanish, German, French |
Memory | 50 data sets |
Power | 2 alkaline C-cells providing ~400 hours of battery life (without backlight); low battery indicator when 1 hour is left |
Size | 8.3 cm width x 21.6 cm length x 5.6 cm depth (3.25 in. x 8.5 in. x 2.2 in.) |
Warranty | 3-year instrument; 2-year cable; 1-year polarographic sensors; 6-month galvanic sensors |
Weight | 475 grams (1.05 lbs.) (with batteries) |

YSI Pro30 Conductivity, Salinity Instrument
SKU: N/AKey Features
- Quick Cal routine allows calibrations with the push of a button; remembers previous calibration values and walks you through the routine
- Stores 50 data sets
- Graphic, backlit display and glow in the dark keypad
- Available with 1, 4, 10, 20, or 30-meter cables (4-meter and longer cables include cable management kit)
- View display with polarized sunglasses on
- Multiple languages include English, Spanish, French and German
- User replaceable cables utilizing a robust MS connector that locks in place with a quarter turn rotation
- Conductivity cell is part of the cable bulkhead and is a proven, field-worthy electrode
- 3-year instrument; 2-year cable warranty
Specifications
Certifications | RoHS, IP-67, Assembled in USA, CE, 1-meter drop test, WEEE |
---|---|
Connector | MS (military spec) waterproof with bayonet lock |
Digital / Digital Sensors | Analog |
Equipment used with | ProSeries 30-x cables |
Graphic Display | backlit display AND keypad, Graphic display with detailed Help |
Languages | German, French, English, Spanish |
Logging Capabilities | Single |
Memory | 50 data sets |
Multiparameter | Yes |
Parameters Measured | Conductivity, Salinity, Total Dissolved Solids (TDS), Temperature |
Power | 2 alkaline C-cells provide 400 continuous hours at ambient temperature without backlight |
Sampling | Yes |
Unit of Measure | Temperature-°C, Conductivity-mS/cm, Salinity-ppt, Total Dissolved Solids (TDS)-g/L |
User Calibratable | Yes |
User Replaceable | Yes |
Warranty | 3-year instrument; 2-year field cables |
Waterproof | IP-67 (even with the battery cover off), floats |

Expert pH Pocket Tester
Expert pH Pocket Tester is designed for on-the-go measurements of pH and temperature. The Expert pH Pocket Tester is best used in applications such as hydroponic gardening, aquaculture, agriculture, pools, cooling towers, and more!
Simultaneously measure pH and temperature with the Thermo Scientific Eutech Expert pH testers, a pocket sized tester designed to provide accurate measurements on the go for a variety of applications, including hydroponic gardening, aquaculture, agriculture, pools, lab work, and other water applications.
- Auto-buffer recognition and auto-calibration make on-site calibration quick and easy
- 3-point calibration allows the tester to accurately measure pH across the acid and alkali ranges
- ±0.1% accuracy
Applications
- Hydroponics
- Agriculture
- Aquaculture & Aquariums
- Pools & Spas
- Education
- Cooling Towers
- Water Treatment
- Environmental Monitoring
- Food & Beverage Manufacturing
- Printing and more!
General Specifications | |
Display Type | 4-Digit, Double-Line |
Includes | Expert pH tester with batteries |
Range (pH) | 0.0 to 14.0 pH |
Resolution (pH) | 0.1 pH |
Accuracy (pH) | ±0.1 pH |
Temperature Compensation | Yes |
Calibration | pH, temperature |
Calibration Points | 1 to 3 pH points |
Resolution (Temperature) | 0.1°C, 0.1°F |
Accuracy (Temperature) | ±0.6°C, ±1.0°F |
Temperature Probe Calibration | 1 point |
Display Type | 4-digit, double-line |
Backlight Option | No |
Measurement Modes | pH, temperature |
Battery Life | 100 hours (average) |
Battery Type | 4 x 1.5V Micro Alkaline |
IP Rating | IP-67 |
Certifications/Compliance | CE, FCC Class A, ROHS-2 |
Temperature (English) Operating | 32.0° to 122.0°F |
Temperature (Metric) Operating | 5° to 45° C (ambient) |
Relative Humidity Range | 5 to 85%, non-condensing |
Weight (English) | 3.4 oz. |
Weight (Metric) | 96.3 g |
Accuracy | ±0.1 pH |
Height (English) | 1.2 in. |
Height (Metric) | 3cm |
Length (English) | 6.7 in. |
Length (Metric) | 17cm |
Resolution | 0.1pH |
Temperature (English) Range | 32.0° to 140.0°F |
Temperature (Metric) Range | 0.0° to 60.0°C |
Width (English) | 1.8 in. |
Width (Metric) | 4.5cm |
Warranty | 1 year |
Unit Size | Each |

YSI EconSense pH100M pH Meter with Extended Memory
Key Features
- Waterproof micro-USB port for transferring data to PC; no software required
- Holds 250 data sets; no need to write down data
- Real-time clock for date/time stamp of saved data
- User-selectable recalibration prompt provides reminder to calibrate
- Automatic buffer recognition (US or NIST buffer sets)
- Auto/Manual temperature compensation
- IP-67 waterproof housing
- 1-year instrument warranty; 6-month electrode warranty
- 1 and 4-meter field cables available; lab pH and ORP electrodes also available
- Autolock mode holds stable readings on display
- Low battery indicator with 150 hour battery life
- Auto shutoff function after 30 minutes of inactivity
- Displays electrode efficiency
Specifications
Autostable | Autolock mode holds stable readings on display |
---|---|
Buffer Recognition | Yes, pH 7.00, 4.01, 10.01 or pH 6.86, 4.00, 9.18 |
Equipment used with | 100-1, 100-4, 110-1, 111-1, 112-1, 115-1, and 130-1 probes |
Measurement Method / Channels | 1 BNC input for pH or mV; 1 input for temperature |
Measurement Range | pH: -2.00 to 16.00 pH units mV: -1999.9 to 1999.9 |
Operating Temperature | 0 to 50° C (32 to 122 °F) |
Parameters Measured | pH, mV (ORP), Temperature |
User Calibratable | Yes; 2-point calibration |
User Replaceable | Yes, probes can be replaced |
Warranty | 1-year instrument, 6-month electrode |

YSI EcoSense DO200A Dissolved Oxygen Meter
Key Features
- 1-year instrument, DO electrode and cable warranty
- IP67 waterproof rating
- Screw-on cap membrane
- Low battery indicator with 500 hour battery life
- Automatic shutoff after 30 minutes of inactivity
- Salinity, pressure and temperature compensation
- CE compliance
- 1-, 4- or 10-meter cable lengths available; BOD probe available
- 50 data set reviewable memory
Specfications
Certifications | IP67 Waterproof |
---|---|
Languages | English |
Measurement Range | Dissolved Oxygen % air saturation-0 to 200% Dissolved Oxygen ppm (mg/L)- to 20 mg/L |
Memory | 50 data set reviewable memory |
Multiparameter | Yes |
Operating Temperature | 0 to 50° C (32 to 122 °F) |
Parameters Measured | Dissolved Oxygen, Temperature |
Sampling | Yes |
Unit of Measure | %, mg/L, air saturation |
User Calibratable | Yes |
User Replaceable | Yes |
Warranty | 1-year instrument, probe and sensor cap |
Waterproof | IP67 Waterproof |

YSI EcoSense DO200M Dissolved Oxygen Meter with Extended Memory
Key Features
- Waterproof micro-USB port for transferring data to PC; no software required
- Holds 250 data sets; no need to write down data
- Real-time clock for date/time stamp of saved data
- User-selectable recalibration prompt provides reminder to calibrate
- IP-67 waterproof housing
- Automatic temperature compensation; manual input for salinity and pressure compensation
- 1-year instrument and probe warranty
- 1-, 4- and 10-meter field cables available; lab self-stirring BOD probe also available
- Low battery indicator with 150 hour battery life
- Screw-on cap membranes with fast response and low-stirring requirement
- Auto shutoff function after 30 minutes of inactivity
Specifications
Measurement Range | Dissolved Oxygen % air saturation: 0 to 200%; Dissolved Oxygen mg/L: 0 to 20 mg/L |
---|---|
Memory | 250 data set reviewable memory |
Operating Temperature | 0 to 50 °C (32 to 122 °F) |
Parameters Measured | Dissolved Oxygen, Temperature |
Power | One 9V battery (included) |
Sampling | Yes |
Unit of Measure | % air saturation, mg/L |
User Calibratable | Yes |
User Replaceable | Yes |
Warranty | 1-year instrument and probe/cable assembly |
Waterproof | IP67 Waterproof |

YSI EcoSense EC300A Conductivity Meter
Key Features
- 1-year instrument, electrode and cable warranty
- IP67 waterproof rating
- Rugged weighted probe assembly; super-stable electrode designed for field use
- Automatic temperature compensation
- Low battery indicator with 500 hour battery life
- Automatic shutoff after 30 minutes of inactivity
- 1-, 4- or 10-meter cable lengths available
- CE compliance
- 50 data set memory
Specifications
Certifications | IP67 Waterproof |
---|---|
Languages | English |
Measurement Range | Conductivity-0 to 499.9 µS/cm, 0 to 4999 µS/cm, 0 to 49.99 mS/cm, 0 to 200.0 mS/cm Salinity-0.0 to 70.0 ppt, calculated TDS (Total Dissolved Solids)-TDS in g/L calculated; enter constant values from 0.30 to 1.00, default value 0.65 Temperature- -10 to +90°C (14 to 194°F) |
Memory | 50 data set reviewable memory |
Multiparameter | Yes |
Operating Temperature | 0 to 50° C (32 to 122 °F) |
Parameters Measured | Conductivity, Salinity, TDS, Temperature |
Sampling | Yes |
Unit of Measure | mS/cm Salinity- ppt TDS-g/L Temperature- °C, Conductivity- µS/cm, °F |
User Calibratable | Yes |
User Replaceable | Yes |
Warranty | 1-year instrument, probe and sensor cap |
Waterproof | IP67 Waterproof |

YSI EcoSense EC300M Conductivity Meter with Extended Memory
Key Features
- Waterproof micro-USB port for transferring data to PC; no software required
- Holds 250 data sets; no need to write down data
- Real-time clock for date/time stamp of saved data
- User-selectable recalibration prompt provides reminder to calibrate
- Automatic temperature compensation
- IP-67 waterproof housing
- 1-year instrument and probe/cable assembly warranty
- 1-, 4- and 10-meter durable field cables available
- Auto shutoff function after 30 minutes of inactivity
- Super-stable, four-electrode conductivity cell designed for the field
Specifications
Measurement Range | Conductivity: 0 to 200.0 mS/cm; Salinity: 0.0 to 70.0 ppt; Total Dissolved Solids (TDS): Calculated in mg/L; Temperature: -10 to +90°C (14 to 194°F) |
---|---|
Memory | 250 data set reviewable memory |
Operating Temperature | 0 to 50° C (32 to 122 °F) |
Parameters Measured | Conductivity, Salinity, TDS, Temperature |
Sampling | Yes |
Unit of Measure | Conductivity: mS/cm or µS/cm; Salinity: ppt; Total Dissolved Solids (TDS): mg/L; Temperature: °C |
User Calibratable | Yes |
User Replaceable | Yes |
Warranty | 1-year instrument and probe/cable assembly |
Waterproof | IP67 Waterproof |

YSI EcoSense EC30A Conductivity Pen
Key Features
- IP-67 waterproof housing
- 1-year instrument warranty
- Automatic temperature compensation
- User-replaceable electrodes
- 1- or 2-point calibration
- Clear, easy-to-read display with on-screen instructions
- Selectable units of measure for conductivity, TDS and temp
- Selectable or auto-ranging for conductivity or TDS
- ”Hold” feature locks readings on display
- >200 hour battery life; low battery indicator
- Last calibration GLP record
Specifications
Certifications | IP67 Waterproof |
---|---|
Languages | English |
Measurement Range | Conductivity-0.0 µS to 19.90 mS, with manual or auto ranging Temperature: 0.0 to 99.5 °C (32.0 to 212 °F) |
Memory | None |
Multiparameter | Yes |
Operating Temperature | 0 to 50° C (32 to 122 °F) |
Parameters Measured | Conductivity, Temperature |
Sampling | Yes |
Unit of Measure | mS/cm Temperature- °C, °F, Conductivity- µS/cm |
User Calibratable | Yes |
Warranty | 1-year instrument, electrode |
Waterproof | IP67 Waterproof Case |

YSI EcoSense ODO200 Optical Dissolved Oxygen and Temperature Meter
Key Features
- Automatic temperature compensation
- 1-year instrument, cable and sensor cap warranty
- 1-, 4- and 10-meter durable field cables available
- Manual input for salinity and pressure compensation
- Low battery indicator with 100 hour battery life
- Replaceable optical sensor cap (12-18 month life)
- Auto shutoff function after 30 minutes of inactivity
- 50 data set reviewable memory
- IP67 waterproof rating
Specifications
Certifications | IP67 waterproof, CE, WEEE, RoHS |
---|---|
Languages | English |
Measurement Range | Dissolved Oxygen % air saturation-0 to 200% Dissolved Oxygen ppm (mg/L)- to 20 mg/L |
Memory | 50 data set reviewable memory |
Multiparameter | Yes |
Operating Temperature | 0 to 50° C (32 to 122 °F) |
Parameters Measured | Dissolved Oxygen, Temperature |
Sampling | Yes |
Unit of Measure | air saturation, mg/L, % |
User Calibratable | Yes |
User Replaceable | Yes |
Warranty | 1-year instrument, probe and sensor cap |
Waterproof | IP67 Waterproof |

YSI EcoSense ODO200M Optical Dissolved Oxygen and Temperature Meter with Extended Memory
Key Features
- Waterproof micro-USB port for transferring data to PC; no software required
- Holds 250 data sets; no need to write down data
- Real-time clock for date/time stamp of saved data
- User-selectable recalibration prompt provides reminder to calibrate
- Automatic temperature compensation; manual input for salinity and pressure compensation
- IP-67 waterproof housing
- Replaceable optical sensor cap with 12-18 month life
- 1-year instrument, probe/cable and sensor cap warranty
- 1-, 4- and 10-meter durable field cables available
- Auto shutoff function after 30 minutes of inactivity
Specifications
Measurement Range | Dissolved Oxygen air saturation: 0 to 200%; Dissolved Oxygen mg/L: 0 to 20 mg/L; Temperature: 0 to 50 °C (32 to 122 °F) |
---|---|
Memory | 250 data set reviewable memory |
Operating Temperature | 0 to 50° C (32 to 122 °F) |
Parameters Measured | Dissolved Oxygen, Temperature |
Sampling | Yes |
Unit of Measure | air saturation (%), mg/L, °C |
User Calibratable | Yes |
User Replaceable | Yes |
Warranty | 1-year instrument, probe/cable and sensor cap |
Waterproof | IP67 Waterproof |

YSI EcoSense ORP15A ORP Temperature Pen Tester
Key Features
- Waterproof IP-67 case
- 1-year warranty; 6-month electrode warranty
- Absolute and relative readings
- Replaceable electrodes
- 50-set memory
- Low battery indicator
- Hold feature locks readings on display
- CE compliance
- >200 hour battery life with low battery indicator
Specifications
Certifications | IP67 Waterproof |
---|---|
Languages | English |
Measurement Range | ORP–1100 to +1100 units Temperature–10 to 100 °C (14.0 to 212 °F) |
Memory | Non-volatile, 50 sets (absolute and relative ORP, temperature, date and time stamp), erase all data function |
Multiparameter | Yes |
Operating Temperature | 0 to 50° C (32 to 122 °F) |
Parameters Measured | ORP, Temperature |
Sampling | Yes |
Unit of Measure | °F, ORP- unit, Temperature: °C |
User Calibratable | Yes |
User Replaceable | Yes |
Warranty | 1-year instrument; 6-months electrode |
Waterproof | IP-67 waterproof case |

YSI EcoSense pH/EC1030A pH and Conductivity Pen
Key Features
- IP-67 waterproof housing
- 1-year instrument, 6-month electrode warranty
- Automatic temperature compensation
- Easily switch between °C and °F
- Clear, easy-to-read graphic LCD display
- Auto shut-off feature
- Replaceable pH and conductivity electrode
- ”Hold” feature locks readings on display
- 50 data-set memory
- >100 hour battery life and low battery indicator
- CE compliant
Specifications
Certifications | IP67 Waterproof, CE |
---|---|
Languages | English |
Measurement Range | pH: 0.00 to 14.00 pH units Conductivity: 0 µS/cm to 20.00 mS/cm TDS: 0 mg/L to 20.00 g/L Salinity: 0.0 to 10.0 ppt |
Memory | 50-set memory (pH/Conductivity/TDS/Salinity and temperature) |
Multiparameter | Yes |
Operating Temperature | 0 to 50° C (32 to 122 °F) |
Parameters Measured | pH, Conductivity, TDS (Total Dissolved Solids), Salinity, Temperature |
Sampling | Yes |
User Calibratable | Yes |
User Replaceable | Yes, replaceable pH and conductivity electrode |
Warranty | 1-year instrument, 6-month electrode |
Waterproof | IP67 Waterproof Case |

YSI EcoSense pH100A pH Meter
Key Features
- 1-year instrument warranty
- IP67 waterproof housing
- Internal buffer recognition
- Auto or manual temperature compensation
- CE compliance
- Sensors are available as single parameter or combinations
- for pH or mV and temperature
- Low battery indicator with 1000 hour battery life
- Electrode offset recognition
- Autolock mode holds stable readings on display
- Displays electrode efficiency
- 50 data set memory
Specifications
Certifications | IP67 Waterproof |
---|---|
Languages | English |
Measurement Range | pH: -2 to 16 units mV: -1999 to +1999 mV Temperature: -10 to +120°C (14 to 248°F) |
Memory | 50 data set reviewable memory |
Multiparameter | Yes |
Operating Temperature | 0 to 50° C (32 to 122 °F) |
Parameters Measured | pH, mV/ORP, Temperature |
Sampling | Yes |
Unit of Measure | °F, mV, pH- unit, Temperature: °C |
User Calibratable | Yes |
User Replaceable | Yes |
Warranty | 1-year instrument, 6-month electrode |
Waterproof | IP67 Waterproof Case |

YSI EcoSense pH10A pH Pen Tester
Key Features
- Waterproof IP-67
- 1-year warranty
- Automatic calibration and buffer recognition
- 50-set memory (pH, temp, date and time stamp)
- Replaceable single- or double-junction electrode
- GLP functionality
- 1-, 2-, or 3-point calibration
- Hold feature locks stable readings on the display
- CE compliance
- >200 hour battery life with low battery indicator
Specifications
Certifications | IP67 Waterproof |
---|---|
Languages | English |
Measurement Range | pH-0.00 to 14.00 units Temperature- |
Memory | temp, date and time stamp), 50-set memory (pH |
Multiparameter | Yes |
Operating Temperature | 0 to 50° C (32 to 122 °F) |
Parameters Measured | pH, Temperature |
Sampling | Yes |
Unit of Measure | pH- unit, °F, Temperature: °C |
User Calibratable | Yes |
User Replaceable | Yes |
Warranty | 1-year instrument, 6-month electrode |
Waterproof | IP67 Waterproof Case |

YSI Pro10 pH or ORP Instrument
Key Features
- User-replaceable cables and sensors provide versatility, reduce down time and reduce overall cost of ownership.
- Available with 1- 4- 10- 20- and 30-m cable lengths standard (cable management kit included on all cables 4-m and longer).
- Smart calibration; the instrument remembers the previous calibration values and simply walks you through the routine.
- Stores 50 data sets; no need to write down data.
- Large graphic, backlit display and glow in the dark keypad. Usable in any lighting condition. The display is also visible when wearing polarized sunglasses.
- Tough. IP67, impact-resistant, waterproof case. Waterproof without the battery cover as well.
- Rubber over molded case provides extra durability. Military spec connectors are unsurpassed for ruggedness.
- Multiple languages include English, Spanish, French, and Portuguese.
- 3-year instrument; 2-year cable; 1-year sensor warranty
Specifications
Certifications | RoHS, 1-meter drop test, Assembled in USA, IP-67, CE, WEEE |
---|---|
Connector | MS (military spec) waterproof with bayonet lock |
Digital / Digital Sensors | Analog |
Equipment used with | ProSeries 10-x, 1007-x and 1008-x |
Graphic Display | Graphic display with detailed Help, backlit display AND keypad |
Languages | English, French and Portuguese, Spanish |
Logging Capabilities | Single |
Measurement Range | pH: -2 to 14 units Temperature: -5 to 55°C ORP: -1500to +1500 mV Temperature: -10 to +120°C (14 to 248°F) |
Memory | 50 data sets |
Multiparameter | Yes |
Operating pH Range | 0 to 14 units |
Parameters Measured | Temperature, pH, ORP |
Power | 2 alkaline C-cells provide 425 continuous hours at ambient temperature without backlight |
Sampling | Yes |
Unit of Measure | ORP- mV, Temperature- °C, pH-unit |
User Calibratable | Yes |
User Replaceable | Yes |
Warranty | 3-year instrument; 2-year field cables |
Waterproof | IP-67 (even with the battery cover off), floats |

YSI Pro1020 Dissolved Oxygen and pH or ORP Instrument
Key Features
- User-replaceable cables and sensors provide versatility, reduce down time and reduce overall cost of ownership.
- Available with 1- 4- 10- 20- and 30-m cable lengths standard (cable management kit included on all cables 4-m and longer).
- Smart calibration; the instrument remembers the previous calibration values and simply walks you through the routine.
- Stores 50 data sets; no need to write down data.
- Large graphic, backlit display and glow in the dark keypad. Usable in any lighting condition. The display is also visible when wearing polarized sunglasses.
- Tough. IP67, impact-resistant, waterproof case. Waterproof without the battery cover as well.
- Rubber over molded case provides extra durability. Military spec connectors are unsurpassed for ruggedness.
- Multiple languages include English, Spanish, French, and Portuguese.
- Choose either polarographic or galvanic DO sensors.
- Quick response times; 95% DO response time in approximately 8 seconds with standard membrane (fastest response time in the market).
- 3-year instrument; 2-year cable; 1-year sensor warranty (Galvanic DO is 6-months)
Specifications
Certifications | IP-67, 1-meter drop test, CE, Assembled in USA, RoHS, WEEE |
---|---|
Connector | MS (military spec) waterproof with bayonet lock |
Digital / Digital Sensors | Analog |
Equipment used with | ProSeries 1020-x cables |
Graphic Display | backlit display AND keypad, Graphic display with detailed Help |
Languages | English, German, Spanish, French |
Logging Capabilities | Single |
Measurement Range | pH-0 to 14 units ORP–1500 to 1500 mV Dissolved Oxygen-0 to 500% air saturation, 0 to 50 mg/L Temperature–5 to 55°C |
Memory | 50 data sets |
Multiparameter | Yes |
Parameters Measured | Dissolved Oxygen, pH, ORP, temperature |
Power | 2 alkaline C-cells provide 425 continuous hours at ambient temperature without backlight |
Sampling | Yes |
Unit of Measure | Temperature-°C, ORP-mV, pH-units, mg/L, Dissolved Oxygen % air saturation |
User Calibratable | Yes |
User Replaceable | Yes |
Warranty | 3-year instrument; 2-year field cables |
Waterproof | floats, IP-67 (even with the battery cover off) |

YSI Pro1030 pH or ORP, Conductivity, Salinity Instrument
Key Features
- Smart calibration routine allows easy calibrations with the press of a button, remembers previous cal values and simply walks you through the calibration
- Stores 50 data sets
- Graphic, backlit display and glow in the dark keypad
- Available with 1, 4, 10, 20, or 30-meter cables (4-meter and longer cables include cable management kit)
- View display with polarized sunglasses on
- Multiple languages include English, Spanish, French and Portuguese
- User replaceable pH or ORP sensors and cables
- Conductivity cell built-in
- 3-year instrument; 2-year cable warranty; 1-year pH and ORP sensor warranty
Specifications
Certifications | CE, WEEE, IP-67, 1-meter drop test, RoHS, Assembled in USA |
---|---|
Connector | MS (military spec) waterproof with bayonet lock |
Digital / Digital Sensors | Analog |
Equipment used with | ProSeries 1030-x cables |
Graphic Display | Graphic display with detailed Help, backlit display AND keypad |
Languages | Spanish, English, German, French |
Logging Capabilities | Single |
Measurement Range | pH- 0 to 14 units ORP-1500 to 1500 mV Conductivity- 0 to 500 mS/cm Salinity-0 to 70 ppt Total Dissolved Solids (TDS)-0 to 100 g/L TDS constant range .30 to 1.00 (.65 default) Temperature–5 to 55°C |
Memory | 50 data sets |
Multiparameter | Yes |
Parameters Measured | ph, ORP, salinity, conductivity, specific conductance, Total Dissolved Solids (TDS), temperature |
Power | 2 alkaline C-cells provide 425 continuous hours at ambient temperature without backlight |
Sampling | Yes |
Unit of Measure | Salinity-ppt, pH-units, Conductivity-mS, ORP-mV, Total Dissolved Solids (TDS)-g/L, Temperature-°C |
User Calibratable | Yes |
User Replaceable | Yes |
Warranty | 3-year instrument; 2-year field cables |
Waterproof | floats, IP-67 (even with the battery cover off) |

YSI Pro20 Dissolved Oxygen Instrument
Key Features
- Internal barometer for highest accuracy
- Choose field DO sensors (Polarographic or Galvanic) or lab BOD probe for BOD in wastewater
- One Touch Cal calibrates within 3 seconds with the push of a button
- Stores 50 data sets
- Graphic, backlit display and glow in the dark keypad
- Available with 1, 4, 10, 20, 30 or 100-meter cables
- View display with polarized sunglasses on
- Fastest response time on the market with 95% response in 8 seconds with standard membrane
- Multiple languages include English, Spanish, French and German
- User replaceable sensors and cables
- 3-year instrument; 2-year cable warranty
Specifications
Certifications | IP-67, RoHS, Assembled in USA, CE, 1-meter drop test, WEEE |
---|---|
Connector | MS (military spec) waterproof with bayonet lock |
Digital / Digital Sensors | Analog |
Equipment used with | ProSeries 20-x cables, ProBOD |
Graphic Display | backlit display AND keypad, Graphic display with detailed Help |
Languages | English, Spanish, French, German |
Logging Capabilities | Single |
Measurement Range | 0 to 500%; 0 to 50 mg/L |
Memory | 50 data sets |
Multiparameter | Yes |
Parameters Measured | Temperature, Dissolved Oxygen, Built-in barameter |
Power | 2 alkaline C-cells provide 450 continuous hours at ambient temperature without backlight |
Sampling | Yes |
Unit of Measure | air saturation, mg/L, Barameter-mmHg, °F, Temperature- °C, Dissolved Oxygen-% |
User Calibratable | Yes |
User Replaceable | Yes |
Warranty | 3-year instrument; 2-year field cables |
Waterproof | floats, IP-67 (even with the battery cover off) |

YSI Pro2030 Dissolved Oxygen, Conductivity, Salinity Instrument
Key Features
- Internal barometer for highest accuracy
- Choose field DO sensors (Polarographic or Galvanic)
- Quick Cal allows DO calibrations within seconds with the push of a button
- Stores 50 data sets
- Graphic, backlit display and glow in the dark keypad
- Available with 1, 4, 10, 20, or 30-meter cables (4-meter and longer cables include cable management kit)
- View display with polarized sunglasses on
- Fastest DO response time on the market with 95% response in 8 seconds with standard membrane
- Multiple languages include English, Spanish, French and German
- User replaceable DO sensors and cables •Conductivity cell built-in
- 3-year instrument; 2-year cable warranty
Specifications
Certifications | CE, RoHS, Assembled in USA, IP-67, WEEE, 1-meter drop test |
---|---|
Connector | MS (military spec) waterproof with bayonet lock |
Digital / Digital Sensors | Analog |
Equipment used with | ProSeries 2030-x cables |
Graphic Display | backlit display AND keypad, Graphic display with detailed Help |
Languages | French, English, Spanish, German |
Logging Capabilities | Single |
Measurement Range | Dissolved Oxygen % air saturation- 0 to 500% air saturation Dissolved Oxygen (mg/L)-0 to 50 mg/L Conductivity-0 to 200 mS/cm Salinity-0 to 70 ppt Total Dissolved Solids (TDS)-0 to 100 g/L TDS constant range .30 to 1.00 (.65 default) Temperature–5 to 55°C Barometer-500 to 800 mmHg |
Memory | 50 data sets |
Multiparameter | Yes |
Parameters Measured | Dissolved Oxygen, Conductivity, Salinity, Total Dissolved Solids (TDS), Temperature, Barometer |
Power | 2 alkaline C-cells provide 400 continuous hours at ambient temperature without backlight |
Sampling | Yes |
Unit of Measure | Temperature-°C, mg/L, Total Dissolved Solids (TDS)-g/L, Conductivity-mS./cm, Salinity-ppt, Dissolved Oxygen-% air saturation, Barometer-mmHg |
User Calibratable | Yes |
User Replaceable | Yes |
Warranty | 3-year instrument; 2-year field cables, 1-year Polarographic sensors, 6-months Galvanic |
Waterproof | floats, IP-67 (even with the battery cover off) |

YSI Pro20i Dissolved Oxygen Instrument
Key Features
- Integral (i.e. built-in) cable with 1- 4- 10-m field cable; user-replaceable DO sensors
- One Touch Cal allows for easy DO calibrations within 3 seconds with the press of a button. Automatic barometric pressure compensation.
- Quick response times; 95% response time in approximately 8 seconds with standard membrane (fastest response time on the market)
- Stores 50 data sets; no need to write down data
- Large graphic, backlit display and glow in the dark keypad
- A true field instrument – the display is visible when wearing polarized sunglasses
- Tough. IP-67, impact-resistant, waterproof case. Waterproof with and without the battery cover
- Rubber over molded case provides extra durability
- Multiple languages: English, Spanish, French, and German
- 3-year instrument; 2-year integral cable; 1-year polarographic sensors; 6-month galvanic sensor warranty
Specifications
Cable Options | 1- 4- 10-m lengths (3.28, 13.1, 32.8 ft.) |
---|---|
Certifications | RoHS, CE, WEEE, IP-67 waterproof, 1-meter drop test |
Languages | English, Spanish, German, French |
Memory | 50 data sets |
Power | 2 alkaline C-cells providing ~400 hours of battery life (without backlight); low battery indicator when 1 hour is left |
Size | 8.3 cm width x 21.6 cm length x 5.6 cm depth (3.25 in. x 8.5 in. x 2.2 in.) |
Warranty | 3-year instrument; 2-year cable; 1-year polarographic sensors; 6-month galvanic sensors |
Weight | 475 grams (1.05 lbs.) (with batteries) |

YSI Pro30 Conductivity, Salinity Instrument
Key Features
- Quick Cal routine allows calibrations with the push of a button; remembers previous calibration values and walks you through the routine
- Stores 50 data sets
- Graphic, backlit display and glow in the dark keypad
- Available with 1, 4, 10, 20, or 30-meter cables (4-meter and longer cables include cable management kit)
- View display with polarized sunglasses on
- Multiple languages include English, Spanish, French and German
- User replaceable cables utilizing a robust MS connector that locks in place with a quarter turn rotation
- Conductivity cell is part of the cable bulkhead and is a proven, field-worthy electrode
- 3-year instrument; 2-year cable warranty
Specifications
Certifications | RoHS, IP-67, Assembled in USA, CE, 1-meter drop test, WEEE |
---|---|
Connector | MS (military spec) waterproof with bayonet lock |
Digital / Digital Sensors | Analog |
Equipment used with | ProSeries 30-x cables |
Graphic Display | backlit display AND keypad, Graphic display with detailed Help |
Languages | German, French, English, Spanish |
Logging Capabilities | Single |
Memory | 50 data sets |
Multiparameter | Yes |
Parameters Measured | Conductivity, Salinity, Total Dissolved Solids (TDS), Temperature |
Power | 2 alkaline C-cells provide 400 continuous hours at ambient temperature without backlight |
Sampling | Yes |
Unit of Measure | Temperature-°C, Conductivity-mS/cm, Salinity-ppt, Total Dissolved Solids (TDS)-g/L |
User Calibratable | Yes |
User Replaceable | Yes |
Warranty | 3-year instrument; 2-year field cables |
Waterproof | IP-67 (even with the battery cover off), floats |

Expert pH Pocket Tester
Expert pH Pocket Tester is designed for on-the-go measurements of pH and temperature. The Expert pH Pocket Tester is best used in applications such as hydroponic gardening, aquaculture, agriculture, pools, cooling towers, and more!
Simultaneously measure pH and temperature with the Thermo Scientific Eutech Expert pH testers, a pocket sized tester designed to provide accurate measurements on the go for a variety of applications, including hydroponic gardening, aquaculture, agriculture, pools, lab work, and other water applications.
- Auto-buffer recognition and auto-calibration make on-site calibration quick and easy
- 3-point calibration allows the tester to accurately measure pH across the acid and alkali ranges
- ±0.1% accuracy
Applications
- Hydroponics
- Agriculture
- Aquaculture & Aquariums
- Pools & Spas
- Education
- Cooling Towers
- Water Treatment
- Environmental Monitoring
- Food & Beverage Manufacturing
- Printing and more!
General Specifications | |
Display Type | 4-Digit, Double-Line |
Includes | Expert pH tester with batteries |
Range (pH) | 0.0 to 14.0 pH |
Resolution (pH) | 0.1 pH |
Accuracy (pH) | ±0.1 pH |
Temperature Compensation | Yes |
Calibration | pH, temperature |
Calibration Points | 1 to 3 pH points |
Resolution (Temperature) | 0.1°C, 0.1°F |
Accuracy (Temperature) | ±0.6°C, ±1.0°F |
Temperature Probe Calibration | 1 point |
Display Type | 4-digit, double-line |
Backlight Option | No |
Measurement Modes | pH, temperature |
Battery Life | 100 hours (average) |
Battery Type | 4 x 1.5V Micro Alkaline |
IP Rating | IP-67 |
Certifications/Compliance | CE, FCC Class A, ROHS-2 |
Temperature (English) Operating | 32.0° to 122.0°F |
Temperature (Metric) Operating | 5° to 45° C (ambient) |
Relative Humidity Range | 5 to 85%, non-condensing |
Weight (English) | 3.4 oz. |
Weight (Metric) | 96.3 g |
Accuracy | ±0.1 pH |
Height (English) | 1.2 in. |
Height (Metric) | 3cm |
Length (English) | 6.7 in. |
Length (Metric) | 17cm |
Resolution | 0.1pH |
Temperature (English) Range | 32.0° to 140.0°F |
Temperature (Metric) Range | 0.0° to 60.0°C |
Width (English) | 1.8 in. |
Width (Metric) | 4.5cm |
Warranty | 1 year |
Unit Size | Each |

YSI EconSense pH100M pH Meter with Extended Memory
Key Features
- Waterproof micro-USB port for transferring data to PC; no software required
- Holds 250 data sets; no need to write down data
- Real-time clock for date/time stamp of saved data
- User-selectable recalibration prompt provides reminder to calibrate
- Automatic buffer recognition (US or NIST buffer sets)
- Auto/Manual temperature compensation
- IP-67 waterproof housing
- 1-year instrument warranty; 6-month electrode warranty
- 1 and 4-meter field cables available; lab pH and ORP electrodes also available
- Autolock mode holds stable readings on display
- Low battery indicator with 150 hour battery life
- Auto shutoff function after 30 minutes of inactivity
- Displays electrode efficiency
Specifications
Autostable | Autolock mode holds stable readings on display |
---|---|
Buffer Recognition | Yes, pH 7.00, 4.01, 10.01 or pH 6.86, 4.00, 9.18 |
Equipment used with | 100-1, 100-4, 110-1, 111-1, 112-1, 115-1, and 130-1 probes |
Measurement Method / Channels | 1 BNC input for pH or mV; 1 input for temperature |
Measurement Range | pH: -2.00 to 16.00 pH units mV: -1999.9 to 1999.9 |
Operating Temperature | 0 to 50° C (32 to 122 °F) |
Parameters Measured | pH, mV (ORP), Temperature |
User Calibratable | Yes; 2-point calibration |
User Replaceable | Yes, probes can be replaced |
Warranty | 1-year instrument, 6-month electrode |

YSI EcoSense DO200A Dissolved Oxygen Meter
Key Features
- 1-year instrument, DO electrode and cable warranty
- IP67 waterproof rating
- Screw-on cap membrane
- Low battery indicator with 500 hour battery life
- Automatic shutoff after 30 minutes of inactivity
- Salinity, pressure and temperature compensation
- CE compliance
- 1-, 4- or 10-meter cable lengths available; BOD probe available
- 50 data set reviewable memory
Specfications
Certifications | IP67 Waterproof |
---|---|
Languages | English |
Measurement Range | Dissolved Oxygen % air saturation-0 to 200% Dissolved Oxygen ppm (mg/L)- to 20 mg/L |
Memory | 50 data set reviewable memory |
Multiparameter | Yes |
Operating Temperature | 0 to 50° C (32 to 122 °F) |
Parameters Measured | Dissolved Oxygen, Temperature |
Sampling | Yes |
Unit of Measure | %, mg/L, air saturation |
User Calibratable | Yes |
User Replaceable | Yes |
Warranty | 1-year instrument, probe and sensor cap |
Waterproof | IP67 Waterproof |

YSI EcoSense DO200M Dissolved Oxygen Meter with Extended Memory
Key Features
- Waterproof micro-USB port for transferring data to PC; no software required
- Holds 250 data sets; no need to write down data
- Real-time clock for date/time stamp of saved data
- User-selectable recalibration prompt provides reminder to calibrate
- IP-67 waterproof housing
- Automatic temperature compensation; manual input for salinity and pressure compensation
- 1-year instrument and probe warranty
- 1-, 4- and 10-meter field cables available; lab self-stirring BOD probe also available
- Low battery indicator with 150 hour battery life
- Screw-on cap membranes with fast response and low-stirring requirement
- Auto shutoff function after 30 minutes of inactivity
Specifications
Measurement Range | Dissolved Oxygen % air saturation: 0 to 200%; Dissolved Oxygen mg/L: 0 to 20 mg/L |
---|---|
Memory | 250 data set reviewable memory |
Operating Temperature | 0 to 50 °C (32 to 122 °F) |
Parameters Measured | Dissolved Oxygen, Temperature |
Power | One 9V battery (included) |
Sampling | Yes |
Unit of Measure | % air saturation, mg/L |
User Calibratable | Yes |
User Replaceable | Yes |
Warranty | 1-year instrument and probe/cable assembly |
Waterproof | IP67 Waterproof |

YSI EcoSense EC300A Conductivity Meter
Key Features
- 1-year instrument, electrode and cable warranty
- IP67 waterproof rating
- Rugged weighted probe assembly; super-stable electrode designed for field use
- Automatic temperature compensation
- Low battery indicator with 500 hour battery life
- Automatic shutoff after 30 minutes of inactivity
- 1-, 4- or 10-meter cable lengths available
- CE compliance
- 50 data set memory
Specifications
Certifications | IP67 Waterproof |
---|---|
Languages | English |
Measurement Range | Conductivity-0 to 499.9 µS/cm, 0 to 4999 µS/cm, 0 to 49.99 mS/cm, 0 to 200.0 mS/cm Salinity-0.0 to 70.0 ppt, calculated TDS (Total Dissolved Solids)-TDS in g/L calculated; enter constant values from 0.30 to 1.00, default value 0.65 Temperature- -10 to +90°C (14 to 194°F) |
Memory | 50 data set reviewable memory |
Multiparameter | Yes |
Operating Temperature | 0 to 50° C (32 to 122 °F) |
Parameters Measured | Conductivity, Salinity, TDS, Temperature |
Sampling | Yes |
Unit of Measure | mS/cm Salinity- ppt TDS-g/L Temperature- °C, Conductivity- µS/cm, °F |
User Calibratable | Yes |
User Replaceable | Yes |
Warranty | 1-year instrument, probe and sensor cap |
Waterproof | IP67 Waterproof |

YSI EcoSense EC300M Conductivity Meter with Extended Memory
Key Features
- Waterproof micro-USB port for transferring data to PC; no software required
- Holds 250 data sets; no need to write down data
- Real-time clock for date/time stamp of saved data
- User-selectable recalibration prompt provides reminder to calibrate
- Automatic temperature compensation
- IP-67 waterproof housing
- 1-year instrument and probe/cable assembly warranty
- 1-, 4- and 10-meter durable field cables available
- Auto shutoff function after 30 minutes of inactivity
- Super-stable, four-electrode conductivity cell designed for the field
Specifications
Measurement Range | Conductivity: 0 to 200.0 mS/cm; Salinity: 0.0 to 70.0 ppt; Total Dissolved Solids (TDS): Calculated in mg/L; Temperature: -10 to +90°C (14 to 194°F) |
---|---|
Memory | 250 data set reviewable memory |
Operating Temperature | 0 to 50° C (32 to 122 °F) |
Parameters Measured | Conductivity, Salinity, TDS, Temperature |
Sampling | Yes |
Unit of Measure | Conductivity: mS/cm or µS/cm; Salinity: ppt; Total Dissolved Solids (TDS): mg/L; Temperature: °C |
User Calibratable | Yes |
User Replaceable | Yes |
Warranty | 1-year instrument and probe/cable assembly |
Waterproof | IP67 Waterproof |

YSI EcoSense EC30A Conductivity Pen
Key Features
- IP-67 waterproof housing
- 1-year instrument warranty
- Automatic temperature compensation
- User-replaceable electrodes
- 1- or 2-point calibration
- Clear, easy-to-read display with on-screen instructions
- Selectable units of measure for conductivity, TDS and temp
- Selectable or auto-ranging for conductivity or TDS
- ”Hold” feature locks readings on display
- >200 hour battery life; low battery indicator
- Last calibration GLP record
Specifications
Certifications | IP67 Waterproof |
---|---|
Languages | English |
Measurement Range | Conductivity-0.0 µS to 19.90 mS, with manual or auto ranging Temperature: 0.0 to 99.5 °C (32.0 to 212 °F) |
Memory | None |
Multiparameter | Yes |
Operating Temperature | 0 to 50° C (32 to 122 °F) |
Parameters Measured | Conductivity, Temperature |
Sampling | Yes |
Unit of Measure | mS/cm Temperature- °C, °F, Conductivity- µS/cm |
User Calibratable | Yes |
Warranty | 1-year instrument, electrode |
Waterproof | IP67 Waterproof Case |

YSI EcoSense ODO200 Optical Dissolved Oxygen and Temperature Meter
Key Features
- Automatic temperature compensation
- 1-year instrument, cable and sensor cap warranty
- 1-, 4- and 10-meter durable field cables available
- Manual input for salinity and pressure compensation
- Low battery indicator with 100 hour battery life
- Replaceable optical sensor cap (12-18 month life)
- Auto shutoff function after 30 minutes of inactivity
- 50 data set reviewable memory
- IP67 waterproof rating
Specifications
Certifications | IP67 waterproof, CE, WEEE, RoHS |
---|---|
Languages | English |
Measurement Range | Dissolved Oxygen % air saturation-0 to 200% Dissolved Oxygen ppm (mg/L)- to 20 mg/L |
Memory | 50 data set reviewable memory |
Multiparameter | Yes |
Operating Temperature | 0 to 50° C (32 to 122 °F) |
Parameters Measured | Dissolved Oxygen, Temperature |
Sampling | Yes |
Unit of Measure | air saturation, mg/L, % |
User Calibratable | Yes |
User Replaceable | Yes |
Warranty | 1-year instrument, probe and sensor cap |
Waterproof | IP67 Waterproof |

YSI EcoSense ODO200M Optical Dissolved Oxygen and Temperature Meter with Extended Memory
Key Features
- Waterproof micro-USB port for transferring data to PC; no software required
- Holds 250 data sets; no need to write down data
- Real-time clock for date/time stamp of saved data
- User-selectable recalibration prompt provides reminder to calibrate
- Automatic temperature compensation; manual input for salinity and pressure compensation
- IP-67 waterproof housing
- Replaceable optical sensor cap with 12-18 month life
- 1-year instrument, probe/cable and sensor cap warranty
- 1-, 4- and 10-meter durable field cables available
- Auto shutoff function after 30 minutes of inactivity
Specifications
Measurement Range | Dissolved Oxygen air saturation: 0 to 200%; Dissolved Oxygen mg/L: 0 to 20 mg/L; Temperature: 0 to 50 °C (32 to 122 °F) |
---|---|
Memory | 250 data set reviewable memory |
Operating Temperature | 0 to 50° C (32 to 122 °F) |
Parameters Measured | Dissolved Oxygen, Temperature |
Sampling | Yes |
Unit of Measure | air saturation (%), mg/L, °C |
User Calibratable | Yes |
User Replaceable | Yes |
Warranty | 1-year instrument, probe/cable and sensor cap |
Waterproof | IP67 Waterproof |

YSI EcoSense ORP15A ORP Temperature Pen Tester
Key Features
- Waterproof IP-67 case
- 1-year warranty; 6-month electrode warranty
- Absolute and relative readings
- Replaceable electrodes
- 50-set memory
- Low battery indicator
- Hold feature locks readings on display
- CE compliance
- >200 hour battery life with low battery indicator
Specifications
Certifications | IP67 Waterproof |
---|---|
Languages | English |
Measurement Range | ORP–1100 to +1100 units Temperature–10 to 100 °C (14.0 to 212 °F) |
Memory | Non-volatile, 50 sets (absolute and relative ORP, temperature, date and time stamp), erase all data function |
Multiparameter | Yes |
Operating Temperature | 0 to 50° C (32 to 122 °F) |
Parameters Measured | ORP, Temperature |
Sampling | Yes |
Unit of Measure | °F, ORP- unit, Temperature: °C |
User Calibratable | Yes |
User Replaceable | Yes |
Warranty | 1-year instrument; 6-months electrode |
Waterproof | IP-67 waterproof case |

YSI EcoSense pH/EC1030A pH and Conductivity Pen
Key Features
- IP-67 waterproof housing
- 1-year instrument, 6-month electrode warranty
- Automatic temperature compensation
- Easily switch between °C and °F
- Clear, easy-to-read graphic LCD display
- Auto shut-off feature
- Replaceable pH and conductivity electrode
- ”Hold” feature locks readings on display
- 50 data-set memory
- >100 hour battery life and low battery indicator
- CE compliant
Specifications
Certifications | IP67 Waterproof, CE |
---|---|
Languages | English |
Measurement Range | pH: 0.00 to 14.00 pH units Conductivity: 0 µS/cm to 20.00 mS/cm TDS: 0 mg/L to 20.00 g/L Salinity: 0.0 to 10.0 ppt |
Memory | 50-set memory (pH/Conductivity/TDS/Salinity and temperature) |
Multiparameter | Yes |
Operating Temperature | 0 to 50° C (32 to 122 °F) |
Parameters Measured | pH, Conductivity, TDS (Total Dissolved Solids), Salinity, Temperature |
Sampling | Yes |
User Calibratable | Yes |
User Replaceable | Yes, replaceable pH and conductivity electrode |
Warranty | 1-year instrument, 6-month electrode |
Waterproof | IP67 Waterproof Case |

YSI EcoSense pH100A pH Meter
Key Features
- 1-year instrument warranty
- IP67 waterproof housing
- Internal buffer recognition
- Auto or manual temperature compensation
- CE compliance
- Sensors are available as single parameter or combinations
- for pH or mV and temperature
- Low battery indicator with 1000 hour battery life
- Electrode offset recognition
- Autolock mode holds stable readings on display
- Displays electrode efficiency
- 50 data set memory
Specifications
Certifications | IP67 Waterproof |
---|---|
Languages | English |
Measurement Range | pH: -2 to 16 units mV: -1999 to +1999 mV Temperature: -10 to +120°C (14 to 248°F) |
Memory | 50 data set reviewable memory |
Multiparameter | Yes |
Operating Temperature | 0 to 50° C (32 to 122 °F) |
Parameters Measured | pH, mV/ORP, Temperature |
Sampling | Yes |
Unit of Measure | °F, mV, pH- unit, Temperature: °C |
User Calibratable | Yes |
User Replaceable | Yes |
Warranty | 1-year instrument, 6-month electrode |
Waterproof | IP67 Waterproof Case |

YSI EcoSense pH10A pH Pen Tester
Key Features
- Waterproof IP-67
- 1-year warranty
- Automatic calibration and buffer recognition
- 50-set memory (pH, temp, date and time stamp)
- Replaceable single- or double-junction electrode
- GLP functionality
- 1-, 2-, or 3-point calibration
- Hold feature locks stable readings on the display
- CE compliance
- >200 hour battery life with low battery indicator
Specifications
Certifications | IP67 Waterproof |
---|---|
Languages | English |
Measurement Range | pH-0.00 to 14.00 units Temperature- |
Memory | temp, date and time stamp), 50-set memory (pH |
Multiparameter | Yes |
Operating Temperature | 0 to 50° C (32 to 122 °F) |
Parameters Measured | pH, Temperature |
Sampling | Yes |
Unit of Measure | pH- unit, °F, Temperature: °C |
User Calibratable | Yes |
User Replaceable | Yes |
Warranty | 1-year instrument, 6-month electrode |
Waterproof | IP67 Waterproof Case |

YSI Pro10 pH or ORP Instrument
Key Features
- User-replaceable cables and sensors provide versatility, reduce down time and reduce overall cost of ownership.
- Available with 1- 4- 10- 20- and 30-m cable lengths standard (cable management kit included on all cables 4-m and longer).
- Smart calibration; the instrument remembers the previous calibration values and simply walks you through the routine.
- Stores 50 data sets; no need to write down data.
- Large graphic, backlit display and glow in the dark keypad. Usable in any lighting condition. The display is also visible when wearing polarized sunglasses.
- Tough. IP67, impact-resistant, waterproof case. Waterproof without the battery cover as well.
- Rubber over molded case provides extra durability. Military spec connectors are unsurpassed for ruggedness.
- Multiple languages include English, Spanish, French, and Portuguese.
- 3-year instrument; 2-year cable; 1-year sensor warranty
Specifications
Certifications | RoHS, 1-meter drop test, Assembled in USA, IP-67, CE, WEEE |
---|---|
Connector | MS (military spec) waterproof with bayonet lock |
Digital / Digital Sensors | Analog |
Equipment used with | ProSeries 10-x, 1007-x and 1008-x |
Graphic Display | Graphic display with detailed Help, backlit display AND keypad |
Languages | English, French and Portuguese, Spanish |
Logging Capabilities | Single |
Measurement Range | pH: -2 to 14 units Temperature: -5 to 55°C ORP: -1500to +1500 mV Temperature: -10 to +120°C (14 to 248°F) |
Memory | 50 data sets |
Multiparameter | Yes |
Operating pH Range | 0 to 14 units |
Parameters Measured | Temperature, pH, ORP |
Power | 2 alkaline C-cells provide 425 continuous hours at ambient temperature without backlight |
Sampling | Yes |
Unit of Measure | ORP- mV, Temperature- °C, pH-unit |
User Calibratable | Yes |
User Replaceable | Yes |
Warranty | 3-year instrument; 2-year field cables |
Waterproof | IP-67 (even with the battery cover off), floats |

YSI Pro1020 Dissolved Oxygen and pH or ORP Instrument
Key Features
- User-replaceable cables and sensors provide versatility, reduce down time and reduce overall cost of ownership.
- Available with 1- 4- 10- 20- and 30-m cable lengths standard (cable management kit included on all cables 4-m and longer).
- Smart calibration; the instrument remembers the previous calibration values and simply walks you through the routine.
- Stores 50 data sets; no need to write down data.
- Large graphic, backlit display and glow in the dark keypad. Usable in any lighting condition. The display is also visible when wearing polarized sunglasses.
- Tough. IP67, impact-resistant, waterproof case. Waterproof without the battery cover as well.
- Rubber over molded case provides extra durability. Military spec connectors are unsurpassed for ruggedness.
- Multiple languages include English, Spanish, French, and Portuguese.
- Choose either polarographic or galvanic DO sensors.
- Quick response times; 95% DO response time in approximately 8 seconds with standard membrane (fastest response time in the market).
- 3-year instrument; 2-year cable; 1-year sensor warranty (Galvanic DO is 6-months)
Specifications
Certifications | IP-67, 1-meter drop test, CE, Assembled in USA, RoHS, WEEE |
---|---|
Connector | MS (military spec) waterproof with bayonet lock |
Digital / Digital Sensors | Analog |
Equipment used with | ProSeries 1020-x cables |
Graphic Display | backlit display AND keypad, Graphic display with detailed Help |
Languages | English, German, Spanish, French |
Logging Capabilities | Single |
Measurement Range | pH-0 to 14 units ORP–1500 to 1500 mV Dissolved Oxygen-0 to 500% air saturation, 0 to 50 mg/L Temperature–5 to 55°C |
Memory | 50 data sets |
Multiparameter | Yes |
Parameters Measured | Dissolved Oxygen, pH, ORP, temperature |
Power | 2 alkaline C-cells provide 425 continuous hours at ambient temperature without backlight |
Sampling | Yes |
Unit of Measure | Temperature-°C, ORP-mV, pH-units, mg/L, Dissolved Oxygen % air saturation |
User Calibratable | Yes |
User Replaceable | Yes |
Warranty | 3-year instrument; 2-year field cables |
Waterproof | floats, IP-67 (even with the battery cover off) |

YSI Pro1030 pH or ORP, Conductivity, Salinity Instrument
Key Features
- Smart calibration routine allows easy calibrations with the press of a button, remembers previous cal values and simply walks you through the calibration
- Stores 50 data sets
- Graphic, backlit display and glow in the dark keypad
- Available with 1, 4, 10, 20, or 30-meter cables (4-meter and longer cables include cable management kit)
- View display with polarized sunglasses on
- Multiple languages include English, Spanish, French and Portuguese
- User replaceable pH or ORP sensors and cables
- Conductivity cell built-in
- 3-year instrument; 2-year cable warranty; 1-year pH and ORP sensor warranty
Specifications
Certifications | CE, WEEE, IP-67, 1-meter drop test, RoHS, Assembled in USA |
---|---|
Connector | MS (military spec) waterproof with bayonet lock |
Digital / Digital Sensors | Analog |
Equipment used with | ProSeries 1030-x cables |
Graphic Display | Graphic display with detailed Help, backlit display AND keypad |
Languages | Spanish, English, German, French |
Logging Capabilities | Single |
Measurement Range | pH- 0 to 14 units ORP-1500 to 1500 mV Conductivity- 0 to 500 mS/cm Salinity-0 to 70 ppt Total Dissolved Solids (TDS)-0 to 100 g/L TDS constant range .30 to 1.00 (.65 default) Temperature–5 to 55°C |
Memory | 50 data sets |
Multiparameter | Yes |
Parameters Measured | ph, ORP, salinity, conductivity, specific conductance, Total Dissolved Solids (TDS), temperature |
Power | 2 alkaline C-cells provide 425 continuous hours at ambient temperature without backlight |
Sampling | Yes |
Unit of Measure | Salinity-ppt, pH-units, Conductivity-mS, ORP-mV, Total Dissolved Solids (TDS)-g/L, Temperature-°C |
User Calibratable | Yes |
User Replaceable | Yes |
Warranty | 3-year instrument; 2-year field cables |
Waterproof | floats, IP-67 (even with the battery cover off) |

YSI Pro20 Dissolved Oxygen Instrument
Key Features
- Internal barometer for highest accuracy
- Choose field DO sensors (Polarographic or Galvanic) or lab BOD probe for BOD in wastewater
- One Touch Cal calibrates within 3 seconds with the push of a button
- Stores 50 data sets
- Graphic, backlit display and glow in the dark keypad
- Available with 1, 4, 10, 20, 30 or 100-meter cables
- View display with polarized sunglasses on
- Fastest response time on the market with 95% response in 8 seconds with standard membrane
- Multiple languages include English, Spanish, French and German
- User replaceable sensors and cables
- 3-year instrument; 2-year cable warranty
Specifications
Certifications | IP-67, RoHS, Assembled in USA, CE, 1-meter drop test, WEEE |
---|---|
Connector | MS (military spec) waterproof with bayonet lock |
Digital / Digital Sensors | Analog |
Equipment used with | ProSeries 20-x cables, ProBOD |
Graphic Display | backlit display AND keypad, Graphic display with detailed Help |
Languages | English, Spanish, French, German |
Logging Capabilities | Single |
Measurement Range | 0 to 500%; 0 to 50 mg/L |
Memory | 50 data sets |
Multiparameter | Yes |
Parameters Measured | Temperature, Dissolved Oxygen, Built-in barameter |
Power | 2 alkaline C-cells provide 450 continuous hours at ambient temperature without backlight |
Sampling | Yes |
Unit of Measure | air saturation, mg/L, Barameter-mmHg, °F, Temperature- °C, Dissolved Oxygen-% |
User Calibratable | Yes |
User Replaceable | Yes |
Warranty | 3-year instrument; 2-year field cables |
Waterproof | floats, IP-67 (even with the battery cover off) |

YSI Pro2030 Dissolved Oxygen, Conductivity, Salinity Instrument
Key Features
- Internal barometer for highest accuracy
- Choose field DO sensors (Polarographic or Galvanic)
- Quick Cal allows DO calibrations within seconds with the push of a button
- Stores 50 data sets
- Graphic, backlit display and glow in the dark keypad
- Available with 1, 4, 10, 20, or 30-meter cables (4-meter and longer cables include cable management kit)
- View display with polarized sunglasses on
- Fastest DO response time on the market with 95% response in 8 seconds with standard membrane
- Multiple languages include English, Spanish, French and German
- User replaceable DO sensors and cables •Conductivity cell built-in
- 3-year instrument; 2-year cable warranty
Specifications
Certifications | CE, RoHS, Assembled in USA, IP-67, WEEE, 1-meter drop test |
---|---|
Connector | MS (military spec) waterproof with bayonet lock |
Digital / Digital Sensors | Analog |
Equipment used with | ProSeries 2030-x cables |
Graphic Display | backlit display AND keypad, Graphic display with detailed Help |
Languages | French, English, Spanish, German |
Logging Capabilities | Single |
Measurement Range | Dissolved Oxygen % air saturation- 0 to 500% air saturation Dissolved Oxygen (mg/L)-0 to 50 mg/L Conductivity-0 to 200 mS/cm Salinity-0 to 70 ppt Total Dissolved Solids (TDS)-0 to 100 g/L TDS constant range .30 to 1.00 (.65 default) Temperature–5 to 55°C Barometer-500 to 800 mmHg |
Memory | 50 data sets |
Multiparameter | Yes |
Parameters Measured | Dissolved Oxygen, Conductivity, Salinity, Total Dissolved Solids (TDS), Temperature, Barometer |
Power | 2 alkaline C-cells provide 400 continuous hours at ambient temperature without backlight |
Sampling | Yes |
Unit of Measure | Temperature-°C, mg/L, Total Dissolved Solids (TDS)-g/L, Conductivity-mS./cm, Salinity-ppt, Dissolved Oxygen-% air saturation, Barometer-mmHg |
User Calibratable | Yes |
User Replaceable | Yes |
Warranty | 3-year instrument; 2-year field cables, 1-year Polarographic sensors, 6-months Galvanic |
Waterproof | floats, IP-67 (even with the battery cover off) |

YSI Pro20i Dissolved Oxygen Instrument
Key Features
- Integral (i.e. built-in) cable with 1- 4- 10-m field cable; user-replaceable DO sensors
- One Touch Cal allows for easy DO calibrations within 3 seconds with the press of a button. Automatic barometric pressure compensation.
- Quick response times; 95% response time in approximately 8 seconds with standard membrane (fastest response time on the market)
- Stores 50 data sets; no need to write down data
- Large graphic, backlit display and glow in the dark keypad
- A true field instrument – the display is visible when wearing polarized sunglasses
- Tough. IP-67, impact-resistant, waterproof case. Waterproof with and without the battery cover
- Rubber over molded case provides extra durability
- Multiple languages: English, Spanish, French, and German
- 3-year instrument; 2-year integral cable; 1-year polarographic sensors; 6-month galvanic sensor warranty
Specifications
Cable Options | 1- 4- 10-m lengths (3.28, 13.1, 32.8 ft.) |
---|---|
Certifications | RoHS, CE, WEEE, IP-67 waterproof, 1-meter drop test |
Languages | English, Spanish, German, French |
Memory | 50 data sets |
Power | 2 alkaline C-cells providing ~400 hours of battery life (without backlight); low battery indicator when 1 hour is left |
Size | 8.3 cm width x 21.6 cm length x 5.6 cm depth (3.25 in. x 8.5 in. x 2.2 in.) |
Warranty | 3-year instrument; 2-year cable; 1-year polarographic sensors; 6-month galvanic sensors |
Weight | 475 grams (1.05 lbs.) (with batteries) |

YSI Pro30 Conductivity, Salinity Instrument
Key Features
- Quick Cal routine allows calibrations with the push of a button; remembers previous calibration values and walks you through the routine
- Stores 50 data sets
- Graphic, backlit display and glow in the dark keypad
- Available with 1, 4, 10, 20, or 30-meter cables (4-meter and longer cables include cable management kit)
- View display with polarized sunglasses on
- Multiple languages include English, Spanish, French and German
- User replaceable cables utilizing a robust MS connector that locks in place with a quarter turn rotation
- Conductivity cell is part of the cable bulkhead and is a proven, field-worthy electrode
- 3-year instrument; 2-year cable warranty
Specifications
Certifications | RoHS, IP-67, Assembled in USA, CE, 1-meter drop test, WEEE |
---|---|
Connector | MS (military spec) waterproof with bayonet lock |
Digital / Digital Sensors | Analog |
Equipment used with | ProSeries 30-x cables |
Graphic Display | backlit display AND keypad, Graphic display with detailed Help |
Languages | German, French, English, Spanish |
Logging Capabilities | Single |
Memory | 50 data sets |
Multiparameter | Yes |
Parameters Measured | Conductivity, Salinity, Total Dissolved Solids (TDS), Temperature |
Power | 2 alkaline C-cells provide 400 continuous hours at ambient temperature without backlight |
Sampling | Yes |
Unit of Measure | Temperature-°C, Conductivity-mS/cm, Salinity-ppt, Total Dissolved Solids (TDS)-g/L |
User Calibratable | Yes |
User Replaceable | Yes |
Warranty | 3-year instrument; 2-year field cables |
Waterproof | IP-67 (even with the battery cover off), floats |

Expert pH Pocket Tester
Expert pH Pocket Tester is designed for on-the-go measurements of pH and temperature. The Expert pH Pocket Tester is best used in applications such as hydroponic gardening, aquaculture, agriculture, pools, cooling towers, and more!
Simultaneously measure pH and temperature with the Thermo Scientific Eutech Expert pH testers, a pocket sized tester designed to provide accurate measurements on the go for a variety of applications, including hydroponic gardening, aquaculture, agriculture, pools, lab work, and other water applications.
- Auto-buffer recognition and auto-calibration make on-site calibration quick and easy
- 3-point calibration allows the tester to accurately measure pH across the acid and alkali ranges
- ±0.1% accuracy
Applications
- Hydroponics
- Agriculture
- Aquaculture & Aquariums
- Pools & Spas
- Education
- Cooling Towers
- Water Treatment
- Environmental Monitoring
- Food & Beverage Manufacturing
- Printing and more!
General Specifications | |
Display Type | 4-Digit, Double-Line |
Includes | Expert pH tester with batteries |
Range (pH) | 0.0 to 14.0 pH |
Resolution (pH) | 0.1 pH |
Accuracy (pH) | ±0.1 pH |
Temperature Compensation | Yes |
Calibration | pH, temperature |
Calibration Points | 1 to 3 pH points |
Resolution (Temperature) | 0.1°C, 0.1°F |
Accuracy (Temperature) | ±0.6°C, ±1.0°F |
Temperature Probe Calibration | 1 point |
Display Type | 4-digit, double-line |
Backlight Option | No |
Measurement Modes | pH, temperature |
Battery Life | 100 hours (average) |
Battery Type | 4 x 1.5V Micro Alkaline |
IP Rating | IP-67 |
Certifications/Compliance | CE, FCC Class A, ROHS-2 |
Temperature (English) Operating | 32.0° to 122.0°F |
Temperature (Metric) Operating | 5° to 45° C (ambient) |
Relative Humidity Range | 5 to 85%, non-condensing |
Weight (English) | 3.4 oz. |
Weight (Metric) | 96.3 g |
Accuracy | ±0.1 pH |
Height (English) | 1.2 in. |
Height (Metric) | 3cm |
Length (English) | 6.7 in. |
Length (Metric) | 17cm |
Resolution | 0.1pH |
Temperature (English) Range | 32.0° to 140.0°F |
Temperature (Metric) Range | 0.0° to 60.0°C |
Width (English) | 1.8 in. |
Width (Metric) | 4.5cm |
Warranty | 1 year |
Unit Size | Each |

YSI EconSense pH100M pH Meter with Extended Memory
Key Features
- Waterproof micro-USB port for transferring data to PC; no software required
- Holds 250 data sets; no need to write down data
- Real-time clock for date/time stamp of saved data
- User-selectable recalibration prompt provides reminder to calibrate
- Automatic buffer recognition (US or NIST buffer sets)
- Auto/Manual temperature compensation
- IP-67 waterproof housing
- 1-year instrument warranty; 6-month electrode warranty
- 1 and 4-meter field cables available; lab pH and ORP electrodes also available
- Autolock mode holds stable readings on display
- Low battery indicator with 150 hour battery life
- Auto shutoff function after 30 minutes of inactivity
- Displays electrode efficiency
Specifications
Autostable | Autolock mode holds stable readings on display |
---|---|
Buffer Recognition | Yes, pH 7.00, 4.01, 10.01 or pH 6.86, 4.00, 9.18 |
Equipment used with | 100-1, 100-4, 110-1, 111-1, 112-1, 115-1, and 130-1 probes |
Measurement Method / Channels | 1 BNC input for pH or mV; 1 input for temperature |
Measurement Range | pH: -2.00 to 16.00 pH units mV: -1999.9 to 1999.9 |
Operating Temperature | 0 to 50° C (32 to 122 °F) |
Parameters Measured | pH, mV (ORP), Temperature |
User Calibratable | Yes; 2-point calibration |
User Replaceable | Yes, probes can be replaced |
Warranty | 1-year instrument, 6-month electrode |

YSI EcoSense DO200A Dissolved Oxygen Meter
Key Features
- 1-year instrument, DO electrode and cable warranty
- IP67 waterproof rating
- Screw-on cap membrane
- Low battery indicator with 500 hour battery life
- Automatic shutoff after 30 minutes of inactivity
- Salinity, pressure and temperature compensation
- CE compliance
- 1-, 4- or 10-meter cable lengths available; BOD probe available
- 50 data set reviewable memory
Specfications
Certifications | IP67 Waterproof |
---|---|
Languages | English |
Measurement Range | Dissolved Oxygen % air saturation-0 to 200% Dissolved Oxygen ppm (mg/L)- to 20 mg/L |
Memory | 50 data set reviewable memory |
Multiparameter | Yes |
Operating Temperature | 0 to 50° C (32 to 122 °F) |
Parameters Measured | Dissolved Oxygen, Temperature |
Sampling | Yes |
Unit of Measure | %, mg/L, air saturation |
User Calibratable | Yes |
User Replaceable | Yes |
Warranty | 1-year instrument, probe and sensor cap |
Waterproof | IP67 Waterproof |

YSI EcoSense DO200M Dissolved Oxygen Meter with Extended Memory
Key Features
- Waterproof micro-USB port for transferring data to PC; no software required
- Holds 250 data sets; no need to write down data
- Real-time clock for date/time stamp of saved data
- User-selectable recalibration prompt provides reminder to calibrate
- IP-67 waterproof housing
- Automatic temperature compensation; manual input for salinity and pressure compensation
- 1-year instrument and probe warranty
- 1-, 4- and 10-meter field cables available; lab self-stirring BOD probe also available
- Low battery indicator with 150 hour battery life
- Screw-on cap membranes with fast response and low-stirring requirement
- Auto shutoff function after 30 minutes of inactivity
Specifications
Measurement Range | Dissolved Oxygen % air saturation: 0 to 200%; Dissolved Oxygen mg/L: 0 to 20 mg/L |
---|---|
Memory | 250 data set reviewable memory |
Operating Temperature | 0 to 50 °C (32 to 122 °F) |
Parameters Measured | Dissolved Oxygen, Temperature |
Power | One 9V battery (included) |
Sampling | Yes |
Unit of Measure | % air saturation, mg/L |
User Calibratable | Yes |
User Replaceable | Yes |
Warranty | 1-year instrument and probe/cable assembly |
Waterproof | IP67 Waterproof |

YSI EcoSense EC300A Conductivity Meter
Key Features
- 1-year instrument, electrode and cable warranty
- IP67 waterproof rating
- Rugged weighted probe assembly; super-stable electrode designed for field use
- Automatic temperature compensation
- Low battery indicator with 500 hour battery life
- Automatic shutoff after 30 minutes of inactivity
- 1-, 4- or 10-meter cable lengths available
- CE compliance
- 50 data set memory
Specifications
Certifications | IP67 Waterproof |
---|---|
Languages | English |
Measurement Range | Conductivity-0 to 499.9 µS/cm, 0 to 4999 µS/cm, 0 to 49.99 mS/cm, 0 to 200.0 mS/cm Salinity-0.0 to 70.0 ppt, calculated TDS (Total Dissolved Solids)-TDS in g/L calculated; enter constant values from 0.30 to 1.00, default value 0.65 Temperature- -10 to +90°C (14 to 194°F) |
Memory | 50 data set reviewable memory |
Multiparameter | Yes |
Operating Temperature | 0 to 50° C (32 to 122 °F) |
Parameters Measured | Conductivity, Salinity, TDS, Temperature |
Sampling | Yes |
Unit of Measure | mS/cm Salinity- ppt TDS-g/L Temperature- °C, Conductivity- µS/cm, °F |
User Calibratable | Yes |
User Replaceable | Yes |
Warranty | 1-year instrument, probe and sensor cap |
Waterproof | IP67 Waterproof |

YSI EcoSense EC300M Conductivity Meter with Extended Memory
Key Features
- Waterproof micro-USB port for transferring data to PC; no software required
- Holds 250 data sets; no need to write down data
- Real-time clock for date/time stamp of saved data
- User-selectable recalibration prompt provides reminder to calibrate
- Automatic temperature compensation
- IP-67 waterproof housing
- 1-year instrument and probe/cable assembly warranty
- 1-, 4- and 10-meter durable field cables available
- Auto shutoff function after 30 minutes of inactivity
- Super-stable, four-electrode conductivity cell designed for the field
Specifications
Measurement Range | Conductivity: 0 to 200.0 mS/cm; Salinity: 0.0 to 70.0 ppt; Total Dissolved Solids (TDS): Calculated in mg/L; Temperature: -10 to +90°C (14 to 194°F) |
---|---|
Memory | 250 data set reviewable memory |
Operating Temperature | 0 to 50° C (32 to 122 °F) |
Parameters Measured | Conductivity, Salinity, TDS, Temperature |
Sampling | Yes |
Unit of Measure | Conductivity: mS/cm or µS/cm; Salinity: ppt; Total Dissolved Solids (TDS): mg/L; Temperature: °C |
User Calibratable | Yes |
User Replaceable | Yes |
Warranty | 1-year instrument and probe/cable assembly |
Waterproof | IP67 Waterproof |

YSI EcoSense EC30A Conductivity Pen
Key Features
- IP-67 waterproof housing
- 1-year instrument warranty
- Automatic temperature compensation
- User-replaceable electrodes
- 1- or 2-point calibration
- Clear, easy-to-read display with on-screen instructions
- Selectable units of measure for conductivity, TDS and temp
- Selectable or auto-ranging for conductivity or TDS
- ”Hold” feature locks readings on display
- >200 hour battery life; low battery indicator
- Last calibration GLP record
Specifications
Certifications | IP67 Waterproof |
---|---|
Languages | English |
Measurement Range | Conductivity-0.0 µS to 19.90 mS, with manual or auto ranging Temperature: 0.0 to 99.5 °C (32.0 to 212 °F) |
Memory | None |
Multiparameter | Yes |
Operating Temperature | 0 to 50° C (32 to 122 °F) |
Parameters Measured | Conductivity, Temperature |
Sampling | Yes |
Unit of Measure | mS/cm Temperature- °C, °F, Conductivity- µS/cm |
User Calibratable | Yes |
Warranty | 1-year instrument, electrode |
Waterproof | IP67 Waterproof Case |

YSI EcoSense ODO200 Optical Dissolved Oxygen and Temperature Meter
Key Features
- Automatic temperature compensation
- 1-year instrument, cable and sensor cap warranty
- 1-, 4- and 10-meter durable field cables available
- Manual input for salinity and pressure compensation
- Low battery indicator with 100 hour battery life
- Replaceable optical sensor cap (12-18 month life)
- Auto shutoff function after 30 minutes of inactivity
- 50 data set reviewable memory
- IP67 waterproof rating
Specifications
Certifications | IP67 waterproof, CE, WEEE, RoHS |
---|---|
Languages | English |
Measurement Range | Dissolved Oxygen % air saturation-0 to 200% Dissolved Oxygen ppm (mg/L)- to 20 mg/L |
Memory | 50 data set reviewable memory |
Multiparameter | Yes |
Operating Temperature | 0 to 50° C (32 to 122 °F) |
Parameters Measured | Dissolved Oxygen, Temperature |
Sampling | Yes |
Unit of Measure | air saturation, mg/L, % |
User Calibratable | Yes |
User Replaceable | Yes |
Warranty | 1-year instrument, probe and sensor cap |
Waterproof | IP67 Waterproof |

YSI EcoSense ODO200M Optical Dissolved Oxygen and Temperature Meter with Extended Memory
Key Features
- Waterproof micro-USB port for transferring data to PC; no software required
- Holds 250 data sets; no need to write down data
- Real-time clock for date/time stamp of saved data
- User-selectable recalibration prompt provides reminder to calibrate
- Automatic temperature compensation; manual input for salinity and pressure compensation
- IP-67 waterproof housing
- Replaceable optical sensor cap with 12-18 month life
- 1-year instrument, probe/cable and sensor cap warranty
- 1-, 4- and 10-meter durable field cables available
- Auto shutoff function after 30 minutes of inactivity
Specifications
Measurement Range | Dissolved Oxygen air saturation: 0 to 200%; Dissolved Oxygen mg/L: 0 to 20 mg/L; Temperature: 0 to 50 °C (32 to 122 °F) |
---|---|
Memory | 250 data set reviewable memory |
Operating Temperature | 0 to 50° C (32 to 122 °F) |
Parameters Measured | Dissolved Oxygen, Temperature |
Sampling | Yes |
Unit of Measure | air saturation (%), mg/L, °C |
User Calibratable | Yes |
User Replaceable | Yes |
Warranty | 1-year instrument, probe/cable and sensor cap |
Waterproof | IP67 Waterproof |

YSI EcoSense ORP15A ORP Temperature Pen Tester
Key Features
- Waterproof IP-67 case
- 1-year warranty; 6-month electrode warranty
- Absolute and relative readings
- Replaceable electrodes
- 50-set memory
- Low battery indicator
- Hold feature locks readings on display
- CE compliance
- >200 hour battery life with low battery indicator
Specifications
Certifications | IP67 Waterproof |
---|---|
Languages | English |
Measurement Range | ORP–1100 to +1100 units Temperature–10 to 100 °C (14.0 to 212 °F) |
Memory | Non-volatile, 50 sets (absolute and relative ORP, temperature, date and time stamp), erase all data function |
Multiparameter | Yes |
Operating Temperature | 0 to 50° C (32 to 122 °F) |
Parameters Measured | ORP, Temperature |
Sampling | Yes |
Unit of Measure | °F, ORP- unit, Temperature: °C |
User Calibratable | Yes |
User Replaceable | Yes |
Warranty | 1-year instrument; 6-months electrode |
Waterproof | IP-67 waterproof case |

YSI EcoSense pH/EC1030A pH and Conductivity Pen
Key Features
- IP-67 waterproof housing
- 1-year instrument, 6-month electrode warranty
- Automatic temperature compensation
- Easily switch between °C and °F
- Clear, easy-to-read graphic LCD display
- Auto shut-off feature
- Replaceable pH and conductivity electrode
- ”Hold” feature locks readings on display
- 50 data-set memory
- >100 hour battery life and low battery indicator
- CE compliant
Specifications
Certifications | IP67 Waterproof, CE |
---|---|
Languages | English |
Measurement Range | pH: 0.00 to 14.00 pH units Conductivity: 0 µS/cm to 20.00 mS/cm TDS: 0 mg/L to 20.00 g/L Salinity: 0.0 to 10.0 ppt |
Memory | 50-set memory (pH/Conductivity/TDS/Salinity and temperature) |
Multiparameter | Yes |
Operating Temperature | 0 to 50° C (32 to 122 °F) |
Parameters Measured | pH, Conductivity, TDS (Total Dissolved Solids), Salinity, Temperature |
Sampling | Yes |
User Calibratable | Yes |
User Replaceable | Yes, replaceable pH and conductivity electrode |
Warranty | 1-year instrument, 6-month electrode |
Waterproof | IP67 Waterproof Case |

YSI EcoSense pH100A pH Meter
Key Features
- 1-year instrument warranty
- IP67 waterproof housing
- Internal buffer recognition
- Auto or manual temperature compensation
- CE compliance
- Sensors are available as single parameter or combinations
- for pH or mV and temperature
- Low battery indicator with 1000 hour battery life
- Electrode offset recognition
- Autolock mode holds stable readings on display
- Displays electrode efficiency
- 50 data set memory
Specifications
Certifications | IP67 Waterproof |
---|---|
Languages | English |
Measurement Range | pH: -2 to 16 units mV: -1999 to +1999 mV Temperature: -10 to +120°C (14 to 248°F) |
Memory | 50 data set reviewable memory |
Multiparameter | Yes |
Operating Temperature | 0 to 50° C (32 to 122 °F) |
Parameters Measured | pH, mV/ORP, Temperature |
Sampling | Yes |
Unit of Measure | °F, mV, pH- unit, Temperature: °C |
User Calibratable | Yes |
User Replaceable | Yes |
Warranty | 1-year instrument, 6-month electrode |
Waterproof | IP67 Waterproof Case |

YSI EcoSense pH10A pH Pen Tester
Key Features
- Waterproof IP-67
- 1-year warranty
- Automatic calibration and buffer recognition
- 50-set memory (pH, temp, date and time stamp)
- Replaceable single- or double-junction electrode
- GLP functionality
- 1-, 2-, or 3-point calibration
- Hold feature locks stable readings on the display
- CE compliance
- >200 hour battery life with low battery indicator
Specifications
Certifications | IP67 Waterproof |
---|---|
Languages | English |
Measurement Range | pH-0.00 to 14.00 units Temperature- |
Memory | temp, date and time stamp), 50-set memory (pH |
Multiparameter | Yes |
Operating Temperature | 0 to 50° C (32 to 122 °F) |
Parameters Measured | pH, Temperature |
Sampling | Yes |
Unit of Measure | pH- unit, °F, Temperature: °C |
User Calibratable | Yes |
User Replaceable | Yes |
Warranty | 1-year instrument, 6-month electrode |
Waterproof | IP67 Waterproof Case |

YSI Pro10 pH or ORP Instrument
Key Features
- User-replaceable cables and sensors provide versatility, reduce down time and reduce overall cost of ownership.
- Available with 1- 4- 10- 20- and 30-m cable lengths standard (cable management kit included on all cables 4-m and longer).
- Smart calibration; the instrument remembers the previous calibration values and simply walks you through the routine.
- Stores 50 data sets; no need to write down data.
- Large graphic, backlit display and glow in the dark keypad. Usable in any lighting condition. The display is also visible when wearing polarized sunglasses.
- Tough. IP67, impact-resistant, waterproof case. Waterproof without the battery cover as well.
- Rubber over molded case provides extra durability. Military spec connectors are unsurpassed for ruggedness.
- Multiple languages include English, Spanish, French, and Portuguese.
- 3-year instrument; 2-year cable; 1-year sensor warranty
Specifications
Certifications | RoHS, 1-meter drop test, Assembled in USA, IP-67, CE, WEEE |
---|---|
Connector | MS (military spec) waterproof with bayonet lock |
Digital / Digital Sensors | Analog |
Equipment used with | ProSeries 10-x, 1007-x and 1008-x |
Graphic Display | Graphic display with detailed Help, backlit display AND keypad |
Languages | English, French and Portuguese, Spanish |
Logging Capabilities | Single |
Measurement Range | pH: -2 to 14 units Temperature: -5 to 55°C ORP: -1500to +1500 mV Temperature: -10 to +120°C (14 to 248°F) |
Memory | 50 data sets |
Multiparameter | Yes |
Operating pH Range | 0 to 14 units |
Parameters Measured | Temperature, pH, ORP |
Power | 2 alkaline C-cells provide 425 continuous hours at ambient temperature without backlight |
Sampling | Yes |
Unit of Measure | ORP- mV, Temperature- °C, pH-unit |
User Calibratable | Yes |
User Replaceable | Yes |
Warranty | 3-year instrument; 2-year field cables |
Waterproof | IP-67 (even with the battery cover off), floats |

YSI Pro1020 Dissolved Oxygen and pH or ORP Instrument
Key Features
- User-replaceable cables and sensors provide versatility, reduce down time and reduce overall cost of ownership.
- Available with 1- 4- 10- 20- and 30-m cable lengths standard (cable management kit included on all cables 4-m and longer).
- Smart calibration; the instrument remembers the previous calibration values and simply walks you through the routine.
- Stores 50 data sets; no need to write down data.
- Large graphic, backlit display and glow in the dark keypad. Usable in any lighting condition. The display is also visible when wearing polarized sunglasses.
- Tough. IP67, impact-resistant, waterproof case. Waterproof without the battery cover as well.
- Rubber over molded case provides extra durability. Military spec connectors are unsurpassed for ruggedness.
- Multiple languages include English, Spanish, French, and Portuguese.
- Choose either polarographic or galvanic DO sensors.
- Quick response times; 95% DO response time in approximately 8 seconds with standard membrane (fastest response time in the market).
- 3-year instrument; 2-year cable; 1-year sensor warranty (Galvanic DO is 6-months)
Specifications
Certifications | IP-67, 1-meter drop test, CE, Assembled in USA, RoHS, WEEE |
---|---|
Connector | MS (military spec) waterproof with bayonet lock |
Digital / Digital Sensors | Analog |
Equipment used with | ProSeries 1020-x cables |
Graphic Display | backlit display AND keypad, Graphic display with detailed Help |
Languages | English, German, Spanish, French |
Logging Capabilities | Single |
Measurement Range | pH-0 to 14 units ORP–1500 to 1500 mV Dissolved Oxygen-0 to 500% air saturation, 0 to 50 mg/L Temperature–5 to 55°C |
Memory | 50 data sets |
Multiparameter | Yes |
Parameters Measured | Dissolved Oxygen, pH, ORP, temperature |
Power | 2 alkaline C-cells provide 425 continuous hours at ambient temperature without backlight |
Sampling | Yes |
Unit of Measure | Temperature-°C, ORP-mV, pH-units, mg/L, Dissolved Oxygen % air saturation |
User Calibratable | Yes |
User Replaceable | Yes |
Warranty | 3-year instrument; 2-year field cables |
Waterproof | floats, IP-67 (even with the battery cover off) |

YSI Pro1030 pH or ORP, Conductivity, Salinity Instrument
Key Features
- Smart calibration routine allows easy calibrations with the press of a button, remembers previous cal values and simply walks you through the calibration
- Stores 50 data sets
- Graphic, backlit display and glow in the dark keypad
- Available with 1, 4, 10, 20, or 30-meter cables (4-meter and longer cables include cable management kit)
- View display with polarized sunglasses on
- Multiple languages include English, Spanish, French and Portuguese
- User replaceable pH or ORP sensors and cables
- Conductivity cell built-in
- 3-year instrument; 2-year cable warranty; 1-year pH and ORP sensor warranty
Specifications
Certifications | CE, WEEE, IP-67, 1-meter drop test, RoHS, Assembled in USA |
---|---|
Connector | MS (military spec) waterproof with bayonet lock |
Digital / Digital Sensors | Analog |
Equipment used with | ProSeries 1030-x cables |
Graphic Display | Graphic display with detailed Help, backlit display AND keypad |
Languages | Spanish, English, German, French |
Logging Capabilities | Single |
Measurement Range | pH- 0 to 14 units ORP-1500 to 1500 mV Conductivity- 0 to 500 mS/cm Salinity-0 to 70 ppt Total Dissolved Solids (TDS)-0 to 100 g/L TDS constant range .30 to 1.00 (.65 default) Temperature–5 to 55°C |
Memory | 50 data sets |
Multiparameter | Yes |
Parameters Measured | ph, ORP, salinity, conductivity, specific conductance, Total Dissolved Solids (TDS), temperature |
Power | 2 alkaline C-cells provide 425 continuous hours at ambient temperature without backlight |
Sampling | Yes |
Unit of Measure | Salinity-ppt, pH-units, Conductivity-mS, ORP-mV, Total Dissolved Solids (TDS)-g/L, Temperature-°C |
User Calibratable | Yes |
User Replaceable | Yes |
Warranty | 3-year instrument; 2-year field cables |
Waterproof | floats, IP-67 (even with the battery cover off) |

YSI Pro20 Dissolved Oxygen Instrument
Key Features
- Internal barometer for highest accuracy
- Choose field DO sensors (Polarographic or Galvanic) or lab BOD probe for BOD in wastewater
- One Touch Cal calibrates within 3 seconds with the push of a button
- Stores 50 data sets
- Graphic, backlit display and glow in the dark keypad
- Available with 1, 4, 10, 20, 30 or 100-meter cables
- View display with polarized sunglasses on
- Fastest response time on the market with 95% response in 8 seconds with standard membrane
- Multiple languages include English, Spanish, French and German
- User replaceable sensors and cables
- 3-year instrument; 2-year cable warranty
Specifications
Certifications | IP-67, RoHS, Assembled in USA, CE, 1-meter drop test, WEEE |
---|---|
Connector | MS (military spec) waterproof with bayonet lock |
Digital / Digital Sensors | Analog |
Equipment used with | ProSeries 20-x cables, ProBOD |
Graphic Display | backlit display AND keypad, Graphic display with detailed Help |
Languages | English, Spanish, French, German |
Logging Capabilities | Single |
Measurement Range | 0 to 500%; 0 to 50 mg/L |
Memory | 50 data sets |
Multiparameter | Yes |
Parameters Measured | Temperature, Dissolved Oxygen, Built-in barameter |
Power | 2 alkaline C-cells provide 450 continuous hours at ambient temperature without backlight |
Sampling | Yes |
Unit of Measure | air saturation, mg/L, Barameter-mmHg, °F, Temperature- °C, Dissolved Oxygen-% |
User Calibratable | Yes |
User Replaceable | Yes |
Warranty | 3-year instrument; 2-year field cables |
Waterproof | floats, IP-67 (even with the battery cover off) |

YSI Pro2030 Dissolved Oxygen, Conductivity, Salinity Instrument
Key Features
- Internal barometer for highest accuracy
- Choose field DO sensors (Polarographic or Galvanic)
- Quick Cal allows DO calibrations within seconds with the push of a button
- Stores 50 data sets
- Graphic, backlit display and glow in the dark keypad
- Available with 1, 4, 10, 20, or 30-meter cables (4-meter and longer cables include cable management kit)
- View display with polarized sunglasses on
- Fastest DO response time on the market with 95% response in 8 seconds with standard membrane
- Multiple languages include English, Spanish, French and German
- User replaceable DO sensors and cables •Conductivity cell built-in
- 3-year instrument; 2-year cable warranty
Specifications
Certifications | CE, RoHS, Assembled in USA, IP-67, WEEE, 1-meter drop test |
---|---|
Connector | MS (military spec) waterproof with bayonet lock |
Digital / Digital Sensors | Analog |
Equipment used with | ProSeries 2030-x cables |
Graphic Display | backlit display AND keypad, Graphic display with detailed Help |
Languages | French, English, Spanish, German |
Logging Capabilities | Single |
Measurement Range | Dissolved Oxygen % air saturation- 0 to 500% air saturation Dissolved Oxygen (mg/L)-0 to 50 mg/L Conductivity-0 to 200 mS/cm Salinity-0 to 70 ppt Total Dissolved Solids (TDS)-0 to 100 g/L TDS constant range .30 to 1.00 (.65 default) Temperature–5 to 55°C Barometer-500 to 800 mmHg |
Memory | 50 data sets |
Multiparameter | Yes |
Parameters Measured | Dissolved Oxygen, Conductivity, Salinity, Total Dissolved Solids (TDS), Temperature, Barometer |
Power | 2 alkaline C-cells provide 400 continuous hours at ambient temperature without backlight |
Sampling | Yes |
Unit of Measure | Temperature-°C, mg/L, Total Dissolved Solids (TDS)-g/L, Conductivity-mS./cm, Salinity-ppt, Dissolved Oxygen-% air saturation, Barometer-mmHg |
User Calibratable | Yes |
User Replaceable | Yes |
Warranty | 3-year instrument; 2-year field cables, 1-year Polarographic sensors, 6-months Galvanic |
Waterproof | floats, IP-67 (even with the battery cover off) |

YSI Pro20i Dissolved Oxygen Instrument
Key Features
- Integral (i.e. built-in) cable with 1- 4- 10-m field cable; user-replaceable DO sensors
- One Touch Cal allows for easy DO calibrations within 3 seconds with the press of a button. Automatic barometric pressure compensation.
- Quick response times; 95% response time in approximately 8 seconds with standard membrane (fastest response time on the market)
- Stores 50 data sets; no need to write down data
- Large graphic, backlit display and glow in the dark keypad
- A true field instrument – the display is visible when wearing polarized sunglasses
- Tough. IP-67, impact-resistant, waterproof case. Waterproof with and without the battery cover
- Rubber over molded case provides extra durability
- Multiple languages: English, Spanish, French, and German
- 3-year instrument; 2-year integral cable; 1-year polarographic sensors; 6-month galvanic sensor warranty
Specifications
Cable Options | 1- 4- 10-m lengths (3.28, 13.1, 32.8 ft.) |
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Certifications | RoHS, CE, WEEE, IP-67 waterproof, 1-meter drop test |
Languages | English, Spanish, German, French |
Memory | 50 data sets |
Power | 2 alkaline C-cells providing ~400 hours of battery life (without backlight); low battery indicator when 1 hour is left |
Size | 8.3 cm width x 21.6 cm length x 5.6 cm depth (3.25 in. x 8.5 in. x 2.2 in.) |
Warranty | 3-year instrument; 2-year cable; 1-year polarographic sensors; 6-month galvanic sensors |
Weight | 475 grams (1.05 lbs.) (with batteries) |

YSI Pro30 Conductivity, Salinity Instrument
Key Features
- Quick Cal routine allows calibrations with the push of a button; remembers previous calibration values and walks you through the routine
- Stores 50 data sets
- Graphic, backlit display and glow in the dark keypad
- Available with 1, 4, 10, 20, or 30-meter cables (4-meter and longer cables include cable management kit)
- View display with polarized sunglasses on
- Multiple languages include English, Spanish, French and German
- User replaceable cables utilizing a robust MS connector that locks in place with a quarter turn rotation
- Conductivity cell is part of the cable bulkhead and is a proven, field-worthy electrode
- 3-year instrument; 2-year cable warranty
Specifications
Certifications | RoHS, IP-67, Assembled in USA, CE, 1-meter drop test, WEEE |
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Connector | MS (military spec) waterproof with bayonet lock |
Digital / Digital Sensors | Analog |
Equipment used with | ProSeries 30-x cables |
Graphic Display | backlit display AND keypad, Graphic display with detailed Help |
Languages | German, French, English, Spanish |
Logging Capabilities | Single |
Memory | 50 data sets |
Multiparameter | Yes |
Parameters Measured | Conductivity, Salinity, Total Dissolved Solids (TDS), Temperature |
Power | 2 alkaline C-cells provide 400 continuous hours at ambient temperature without backlight |
Sampling | Yes |
Unit of Measure | Temperature-°C, Conductivity-mS/cm, Salinity-ppt, Total Dissolved Solids (TDS)-g/L |
User Calibratable | Yes |
User Replaceable | Yes |
Warranty | 3-year instrument; 2-year field cables |
Waterproof | IP-67 (even with the battery cover off), floats |