Hygrometers

A hygrometer measures the humidity and water vapour in the air. A thermohygrometer measures both humidity and temperature.

Within a volume of air, the maximum amount of water vapour it can hold varies greatly by temperature with cold air holding a fraction of what warmer air will. Most moisture meters use temperature to give the relative humidity (RH) for a particular temperature and display it as a percentage. Most models have a built-in digital LCD display but there are several which use an analogue readout, these are primarily for continuous monitoring.

These instruments all feature built-in displays and some offer features such as datalogging, web bulb temperature or dewpoint.

RS offers a range of thermo-hygrometers, many of which can be calibrated to UCAS or RS Calibration standards to ensure accurate measurements.


What are thermohygrometers used for?


Primarily, thermo-hygrometers are used to test HVAC systems and office environments. They often feature a probe which can be inserted through an air-conditioning duct to get readings from within the ducting.


What's the difference between a thermo hygrometer and a moisture meter?


A hygrometer measures the moister in the air and a moisture meter measures the moisture within a material such as wood, paper or stud walls.


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Description Price Absolute Maximum Temperature Measurement Hygrometer Type Maximum Humidity Measurement Best Temperature Measurement Accuracy Temperature Measurement Resolution Best Humidity Measurement Accuracy Humidity Measurement Resolution Dewpoint Measurement Meter Type Interface Type Printer Functions Power Source Battery Type
RS Stock No. 123-2232
BrandRS PRO
SGD796.22
Each
units
+1333 (Type2) °C, +140 (Type1) °F, +2431 (Type2) °F, +60 (Type1) °C Digital Hygrometer 95%RH ±0.1 %, ±0.8 °C, ±1.5 °F 0.1 °F, 0.1 °C ±3 %RH - Yes Handheld - Yes Dew Point, Hold, Maximum & Minimum Display Battery AAA
RS Stock No. 106-5306
BrandRS PRO
SGD157.72
Each
units
+50°C Digital Hygrometer 99%RH ±1 °C 0.1°C ±5 % 0.1%RH Yes Handheld - - Data Hold Battery AAA
RS Stock No. 165-1486
BrandRS PRO
SGD33.10
Each
units
+60°C Thermohygrometer 80%RH ±5 % - ±5 % - - Analogue - - Measuring - -
RS Stock No. 127-8296
BrandRS PRO
SGD348.55
Each
units
+100 °C, +212 °F Digital Hygrometer 100%RH ±0.4 °C, ±0.8 °F 0.1 °C, 0.1 °F ±3 %RH 0.1%RH Yes Handheld - - Alarm, Comparator, Data Hold Battery 9V
RS Stock No. 123-2230
BrandRS PRO
SGD268.87
Each
units
+140 °F, +60 °C Digital Hygrometer 95%RH ±0.8°C, ±1.5°F 0.1 °C, 0.1 °F ±3 %RH 0.1%RH Yes Handheld - - Dew Point, Hold, Memory, Read Battery 9V
RS Stock No. 123-2233
BrandRS PRO
SGD292.20
Each
units
+140 °F, +60 °C Digital Hygrometer 95%RH ±0.5 °C, ±0.9 °F 0.1 °F, 0.1 °C ±3 %RH 0.1%RH Yes Handheld - - Dew Point, Hold, Maximum & Minimum Display, Record, Relative, Wet Bulb Battery AAA
RS Stock No. 127-8297
BrandRS PRO
SGD530.31
Each
units
+100 °C, +212 °F Digital Hygrometer 100%RH ±0.4 °C, ±0.8 °F 0.1 °C, 0.1 °F ±3 %RH 0.1%RH Yes Handheld USB - Alarm, Comparator, Data Hold Battery 9V
RS Stock No. 123-2210
BrandRS PRO
SGD190.98
Each
units
- Digital Hygrometer 99%RH - 0.1°C ±3 % HR 0.1%RH - - - No Dew Point, Hydrometry, Max/MIN/HOLD, Temperature Battery PP3 9V
RS Stock No. 155-8900
BrandRS PRO
SGD83.56
Each
units
- Digital Hygrometer 100%RH ±0.5 °C 0.1°C ±3 %RH 0.1%RH - - Bluetooth - - Battery 9V
RS Stock No. 196-8736
BrandRS PRO
SGD40.46
Each
units
- Digital Hygrometer 99%RH - - ±5 %RH - - - - - - - -
RS Stock No. 195-9129
BrandRS PRO
SGD42.29
Each
units
- Digital Hygrometer 99%RH - 0.1 °C, 0.1 °F ±4 %RH 0.1%RH No Digital - No Measuring Battery AA
RS Stock No. 724-4193
Mfr. Part No.2418208
BrandFluke
SGD714.09
Each
units
+60°C Digital Hygrometer 95%RH ±0.5 °C 0.1°C ±2.5 %RH 0.1%RH Yes Handheld - - Record Battery AAA
RS Stock No. 412-3062
Mfr. Part No.0560 6081
BrandTesto
SGD141.73
Each
units
+50°C Digital Hygrometer 95%RH ±0.5 + 1 Digit °C 0.1°C ±3 %RH 0.1%RH Yes Digital - - - Battery 9V
RS Stock No. 420-7261
Mfr. Part No.0560 6082
BrandTesto
SGD215.89
Each
units
+70°C Digital Hygrometer 98%RH ±0.5 + 1 Digit °C 0.1°C ±2 %RH 0.1%RH Yes Digital - - - Battery 9V
RS Stock No. 206-8913
Mfr. Part No.13/222/3
BrandBrannan
SGD37.35
Each
units
+50°C Thermohygrometer - ±0.5 °C - - - - Wall Mounted - - - - -
RS Stock No. 348-8267
Mfr. Part No.DPWC111000
BrandCarel
SGD270.61
Each
units
+50°C Thermohygrometer 90%RH ±1.2 °C - ±3 %RH - - - - - - Mains -
RS Stock No. 292-357
Mfr. Part No.0560 0610
BrandTesto
SGD274.65
Each
units
+50°C Digital Hygrometer 100%RH ±0.5 °C 0.1°C ±2.5 %RH 0.1%RH Yes - - - Hold Battery AAA
RS Stock No. 476-909
Mfr. Part No.13/606/2
BrandBrannan
SGD117.96
Each
units
+50°C Thermohygrometer - ±0.5 °C - - - - Handheld - - - - -
RS Stock No. 777-0444
Mfr. Part No.0560 6220
BrandTesto
SGD464.15
Each
units
+60°C Digital Hygrometer 100%RH ±0.4 °C 0.1°C ±2 %RH, ±3 %RH 0.1%RH - Digital - - Maximum & Minimum Display Battery 4 x AA
RS Stock No. 615-3239
Mfr. Part No.HI9564
SGD364.80
Each
units
+60°C Digital Hygrometer 95%RH ±0.5 °C 0.1°C ±3 %RH 0.1%RH - Handheld - - Hold Battery 9V