Thermohygrometers

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 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 Battery Life
RS Stock No. 123-2230
BrandRS PRO
$209.80
Each
units
+140 °F, +60 °C 95%RH ±0.4 °C, ±0.8 °F 0.1 °C, 0.1 °F ±3 %RH 0.1%RH Yes Handheld - - Dew Point, Hold, Memory, Read Battery 9V 140 h
RS Stock No. 123-2210
BrandRS PRO
$154.45
Each
units
- 99%RH - 0.1°C ±3 % HR 0.1%RH - - - No Dew Point, Hydrometry, Max/MIN/HOLD, Temperature Battery PP3 9V PP3 200 h
RS Stock No. 127-8297
BrandRS PRO
$363.65
Each
units
+100 °C, +212 °F 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 006P 9V, NEDA 1604 2 month
RS Stock No. 123-2232
BrandRS PRO
$643.58
Each
units
+1333 (Type2) °C, +140 (Type1) °F, +2431 (Type2) °F, +60 (Type1) °C 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 90 h, 100 (Except Printing & Beeper) h
RS Stock No. 127-8296
BrandRS PRO
$292.53
Each
units
+100 °C, +212 °F 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 006P 9V, NEDA 1604 2 month
RS Stock No. 123-2233
BrandRS PRO
$200.87
Each
units
+140 °F, +60 °C 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 200 h
RS Stock No. 106-5306
BrandRS PRO
$127.42
Each
units
+50°C 99%RH ±1 °C 0.1°C ±5 % 0.1%RH Yes Handheld - - Data Hold Battery AAA -
RS Stock No. 165-1486
BrandRS PRO
$24.52
Each
units
+60°C 80%RH ±5 % - ±5 % - - Analogue - - Measuring - - -
RS Stock No. 724-4193
Mfr. Part No.FLUKE-971
BrandFluke
$533.50
Each
units
+60°C 95%RH ±0.5 °C 0.1°C ±2.5 %RH 0.1%RH Yes Handheld - - Record Battery AAA 200 h
RS Stock No. 516-0573
Mfr. Part No.0563 6352
BrandTesto
$816.20
Each
units
+1370°C 100%RH ±0.3 °C 0.1°C - 0.1%RH Yes - USB - - Battery AA 200 h
RS Stock No. 512-0244
Mfr. Part No.0560 6351
BrandTesto
$569.80
Each
units
- - - - - - - - - - - Battery AA 200 h
RS Stock No. 327-6294
Mfr. Part No.0560 6450
BrandTesto
$1,023.00
Each
units
- - - - - - - - - - - Battery - 20 → 45 h
RS Stock No. 412-3062
Mfr. Part No.0560 6081
BrandTesto
$240.84
Each
units
+50°C 95%RH ±0.5 + 1 Digit °C 0.1°C ±3 %RH 0.1%RH Yes Digital - - - Battery 9V 1 yr
RS Stock No. 292-335
Mfr. Part No.0560 6062
BrandTesto
$396.37
Each
units
+50°C 100%RH ±0.5 °C 0.1°C ±1 %RH 0.1%RH - Handheld - - - Battery AAA 130 h
RS Stock No. 777-0440
Mfr. Part No.0560 6230
BrandTesto
$302.49
Each
units
+60°C 100%RH ±0.4 °C 0.1°C ±2 %RH, ±3 %RH 0.1%RH - Digital - - Maximum & Minimum Display Battery 4 x AA 1 yr
RS Stock No. 292-357
Mfr. Part No.0560 0610
BrandTesto
$423.12
Each
units
+50°C 100%RH ±0.5 °C 0.1°C ±2.5 %RH 0.1%RH Yes - - - Hold Battery AAA 200 h
RS Stock No. 735-6757
Mfr. Part No.0563 6251
BrandTesto
$410.97
Each
units
+1370°C 100%RH ±0.5 °C 0.1°C ±2.5 %RH 0.1%RH Yes Handheld - - Hold Battery 9V 70 h
RS Stock No. 913-2585
Mfr. Part No.0560 1605
BrandTesto
$153.97
Each
units
+60°C 100%RH ±0.5 °C 0.1°C ±1.8 %RH 0.1%RH Yes Handheld - - Measuring Battery AAA Micro 250 h
RS Stock No. 348-8267
Mfr. Part No.DPWC111000
BrandCarel
$193.19
Each
units
+50°C 90%RH ±1.2 °C - ±3 %RH - - - - - - Mains - -
RS Stock No. 725-9521
Mfr. Part No.HygroPalm HP21
$709.69
Each
units
+60°C 100%RH ±0.2 °C 0.01K ±1 %RH 1%RH Yes Handheld USB - Alarm, Data Logging Battery 9V 100 h
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