
Masons Hygrometer
SKU: N/AHoused in a yellow polypropylene plastic case, 380 x 80mm, complete with lid and bulb protectors and detachable water cistern. Supplied in carton with hygrometric tables, spare wick and mounting screws.
Order Code | Range |
P2500 | -5/+50°C |
P2501 | -5/+50°C & -20/+120°F |

Whirling Hygrometer
SKU: N/AThe Whirling Pattern Psychometer offer the maximum level of accuracy due to the nature of measurement. Housed in a robust yellow plastic frame with black folding handle the instrument incorporates a water cistern linked to the ‘Wet’ bulb by means of a cotton sleeve. Frame size 230mm x 50mm.
Code | Range |
P2520 | -5/+50c |
P2522 | 20/120f |
P2526 | -15/+40c |
P2528 | -5/+50c |
P2524Y | Yellow Carrying Case only |

Hygromatic Hygrometer
SKU: N/AThe ‘Hygromatic’ is a clever innovation in hygrometry providing automatic indication of both relative humidity and temperature without having to refer tables. Housed in a white plastic case with intregal cistern the ‘Wet’ bulb has a % RH and in addition to the temperature scale on the ‘Dry’ bulb thermometer there is a revolving scale at the top of the case diameter is 320mm x 60mm.
Code P2510 – Range 0/38°C & 32/100° + Humidity

Dial Hygrometers
SKU: N/AThe selection of direct reading dial hygrometers offers ease of use with surprisingly good accuracy. Housed in black steel cases with polished chrome bezels the case incorporates a hanging ring for wall mounting.
Code | Diameter | Movement |
P2530 | 85mm | Spiral |
P2531 | 100mm | Hair |

Mini-Dial Hygrometer
SKU: N/AA unique and highly attractive dial hygrometer housed in a brass finished case with polished brass bezel. The bezel is formed to incorporate a mini rear flange, 3 hole fixing, suitable for mounting the instrument flush on a panel or similar surface. Originally designed to be fitted into presentation boxes or mounted on boards with matching thermometers the instrument is eminently suitable for a wide variety of applications.
- Code P2535 – Range 0-100% RH.
Diameter of front flange = 35mm
Diameter of case (Cut-out) = 33mm

Masons Hygrometer
Housed in a yellow polypropylene plastic case, 380 x 80mm, complete with lid and bulb protectors and detachable water cistern. Supplied in carton with hygrometric tables, spare wick and mounting screws.
Order Code | Range |
P2500 | -5/+50°C |
P2501 | -5/+50°C & -20/+120°F |

Whirling Hygrometer
The Whirling Pattern Psychometer offer the maximum level of accuracy due to the nature of measurement. Housed in a robust yellow plastic frame with black folding handle the instrument incorporates a water cistern linked to the ‘Wet’ bulb by means of a cotton sleeve. Frame size 230mm x 50mm.
Code | Range |
P2520 | -5/+50c |
P2522 | 20/120f |
P2526 | -15/+40c |
P2528 | -5/+50c |
P2524Y | Yellow Carrying Case only |

Hygromatic Hygrometer
The ‘Hygromatic’ is a clever innovation in hygrometry providing automatic indication of both relative humidity and temperature without having to refer tables. Housed in a white plastic case with intregal cistern the ‘Wet’ bulb has a % RH and in addition to the temperature scale on the ‘Dry’ bulb thermometer there is a revolving scale at the top of the case diameter is 320mm x 60mm.
Code P2510 – Range 0/38°C & 32/100° + Humidity

Dial Hygrometers
The selection of direct reading dial hygrometers offers ease of use with surprisingly good accuracy. Housed in black steel cases with polished chrome bezels the case incorporates a hanging ring for wall mounting.
Code | Diameter | Movement |
P2530 | 85mm | Spiral |
P2531 | 100mm | Hair |

Mini-Dial Hygrometer
A unique and highly attractive dial hygrometer housed in a brass finished case with polished brass bezel. The bezel is formed to incorporate a mini rear flange, 3 hole fixing, suitable for mounting the instrument flush on a panel or similar surface. Originally designed to be fitted into presentation boxes or mounted on boards with matching thermometers the instrument is eminently suitable for a wide variety of applications.
- Code P2535 – Range 0-100% RH.
Diameter of front flange = 35mm
Diameter of case (Cut-out) = 33mm

Masons Hygrometer
Housed in a yellow polypropylene plastic case, 380 x 80mm, complete with lid and bulb protectors and detachable water cistern. Supplied in carton with hygrometric tables, spare wick and mounting screws.
Order Code | Range |
P2500 | -5/+50°C |
P2501 | -5/+50°C & -20/+120°F |

Whirling Hygrometer
The Whirling Pattern Psychometer offer the maximum level of accuracy due to the nature of measurement. Housed in a robust yellow plastic frame with black folding handle the instrument incorporates a water cistern linked to the ‘Wet’ bulb by means of a cotton sleeve. Frame size 230mm x 50mm.
Code | Range |
P2520 | -5/+50c |
P2522 | 20/120f |
P2526 | -15/+40c |
P2528 | -5/+50c |
P2524Y | Yellow Carrying Case only |

Hygromatic Hygrometer
The ‘Hygromatic’ is a clever innovation in hygrometry providing automatic indication of both relative humidity and temperature without having to refer tables. Housed in a white plastic case with intregal cistern the ‘Wet’ bulb has a % RH and in addition to the temperature scale on the ‘Dry’ bulb thermometer there is a revolving scale at the top of the case diameter is 320mm x 60mm.
Code P2510 – Range 0/38°C & 32/100° + Humidity

Dial Hygrometers
The selection of direct reading dial hygrometers offers ease of use with surprisingly good accuracy. Housed in black steel cases with polished chrome bezels the case incorporates a hanging ring for wall mounting.
Code | Diameter | Movement |
P2530 | 85mm | Spiral |
P2531 | 100mm | Hair |

Mini-Dial Hygrometer
A unique and highly attractive dial hygrometer housed in a brass finished case with polished brass bezel. The bezel is formed to incorporate a mini rear flange, 3 hole fixing, suitable for mounting the instrument flush on a panel or similar surface. Originally designed to be fitted into presentation boxes or mounted on boards with matching thermometers the instrument is eminently suitable for a wide variety of applications.
- Code P2535 – Range 0-100% RH.
Diameter of front flange = 35mm
Diameter of case (Cut-out) = 33mm

Masons Hygrometer
Housed in a yellow polypropylene plastic case, 380 x 80mm, complete with lid and bulb protectors and detachable water cistern. Supplied in carton with hygrometric tables, spare wick and mounting screws.
Order Code | Range |
P2500 | -5/+50°C |
P2501 | -5/+50°C & -20/+120°F |

Whirling Hygrometer
The Whirling Pattern Psychometer offer the maximum level of accuracy due to the nature of measurement. Housed in a robust yellow plastic frame with black folding handle the instrument incorporates a water cistern linked to the ‘Wet’ bulb by means of a cotton sleeve. Frame size 230mm x 50mm.
Code | Range |
P2520 | -5/+50c |
P2522 | 20/120f |
P2526 | -15/+40c |
P2528 | -5/+50c |
P2524Y | Yellow Carrying Case only |

Hygromatic Hygrometer
The ‘Hygromatic’ is a clever innovation in hygrometry providing automatic indication of both relative humidity and temperature without having to refer tables. Housed in a white plastic case with intregal cistern the ‘Wet’ bulb has a % RH and in addition to the temperature scale on the ‘Dry’ bulb thermometer there is a revolving scale at the top of the case diameter is 320mm x 60mm.
Code P2510 – Range 0/38°C & 32/100° + Humidity

Dial Hygrometers
The selection of direct reading dial hygrometers offers ease of use with surprisingly good accuracy. Housed in black steel cases with polished chrome bezels the case incorporates a hanging ring for wall mounting.
Code | Diameter | Movement |
P2530 | 85mm | Spiral |
P2531 | 100mm | Hair |

Mini-Dial Hygrometer
A unique and highly attractive dial hygrometer housed in a brass finished case with polished brass bezel. The bezel is formed to incorporate a mini rear flange, 3 hole fixing, suitable for mounting the instrument flush on a panel or similar surface. Originally designed to be fitted into presentation boxes or mounted on boards with matching thermometers the instrument is eminently suitable for a wide variety of applications.
- Code P2535 – Range 0-100% RH.
Diameter of front flange = 35mm
Diameter of case (Cut-out) = 33mm