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. 123-2210
BrandRS PRO
$204.23
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. 106-5306
BrandRS PRO
$168.58
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. 123-2232
BrandRS PRO
$810.93
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. 123-2230
BrandRS PRO
$275.88
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. 195-9129
BrandRS PRO
$42.50
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. 127-8296
BrandRS PRO
$372.54
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. 155-8900
BrandRS PRO
$123.49
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
$37.63
Each
units
- Digital Hygrometer 99%RH - - ±5 %RH - - - - - - - -
RS Stock No. 123-2233
BrandRS PRO
$295.08
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. 165-1486
BrandRS PRO
$28.86
Each
units
+60°C Thermohygrometer 80%RH ±5 % - ±5 % - - Analogue - - Measuring - -
RS Stock No. 127-8297
BrandRS PRO
$487.38
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. 724-4193
Mfr. Part No.2418208
BrandFluke
$526.00
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
$240.71
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
$233.67
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. 615-3245
Mfr. Part No.HI9565
$462.29
Each
units
- Digital Hygrometer - - - - - - - - - - Battery 9V
RS Stock No. 206-8913
Mfr. Part No.13/222/3
BrandBrannan
$39.76
Each
units
+50°C Thermohygrometer - ±0.5 °C - - - - Wall Mounted - - - - -
RS Stock No. 476-909
Mfr. Part No.13/606/2
BrandBrannan
$125.63
Each
units
+50°C Thermohygrometer - ±0.5 °C - - - - Handheld - - - - -
RS Stock No. 512-0244
Mfr. Part No.0560 6351
BrandTesto
$594.54
Each
units
- Digital Hygrometer - - - - - - - - - - Battery AA
RS Stock No. 292-357
Mfr. Part No.0560 0610
BrandTesto
$415.55
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. 327-6294
Mfr. Part No.0560 6450
BrandTesto
$1,092.18
Each
units
+50°C Digital Hygrometer - - - - - - - - - - Battery -