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. 724-4193
Mfr. Part No.2418208
BrandFluke
$578.60
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. 516-0573
Mfr. Part No.0563 6352
BrandTesto
$835.07
Each
units
+1370°C Digital Hygrometer 100%RH ±0.3 °C 0.1°C - 0.1%RH Yes - USB - - Battery AA
RS Stock No. 327-6294
Mfr. Part No.0560 6450
BrandTesto
$1,156.56
Each
units
+50°C Digital Hygrometer - - - - - - - - - - Battery -
RS Stock No. 512-0244
Mfr. Part No.0560 6351
BrandTesto
$629.60
Each
units
- Digital Hygrometer - - - - - - - - - - Battery AA
RS Stock No. 412-3062
Mfr. Part No.0560 6081
BrandTesto
$258.52
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. 292-335
Mfr. Part No.0560 6062
BrandTesto
$323.30
Each
units
+50°C Digital Hygrometer 100%RH ±0.5 °C 0.1°C ±1 %RH 0.1%RH - Handheld - - - Battery AAA
RS Stock No. 348-8267
Mfr. Part No.DPWC111000
BrandCarel
$254.03
Each
units
+50°C Thermohygrometer 90%RH ±1.2 °C - ±3 %RH - - - - - - Mains -
RS Stock No. 615-3239
Mfr. Part No.HI9564
$396.27
Each
units
+60°C Digital Hygrometer 95%RH ±0.5 °C 0.1°C ±3 %RH 0.1%RH - Handheld - - Hold Battery 9V
RS Stock No. 725-9521
Mfr. Part No.HygroPalm HP21
$778.49
Each
units
+60°C Digital Hygrometer 100%RH ±0.2 °C 0.01K ±1 %RH 1%RH Yes Handheld USB - Alarm, Data Logging Battery 9V
RS Stock No. 292-357
Mfr. Part No.0560 0610
BrandTesto
$433.91
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. 735-6757
Mfr. Part No.0563 6251
BrandTesto
$449.08
Each
units
+1370°C Digital Hygrometer 100%RH ±0.5 °C 0.1°C ±2.5 %RH 0.1%RH Yes Handheld - - Hold Battery 9V
RS Stock No. 777-0440
Mfr. Part No.0560 6230
BrandTesto
$348.68
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. 136-5501
Mfr. Part No.HC2A-S
$656.51
Each
units
+100°C Thermohygrometer 100%RH ±0.1 K 0.1°C ±0.5 %RH <1%RH Yes Handheld UART - Measuring - -
RS Stock No. 201-2157
Mfr. Part No.0560 2605 02
BrandTesto
$177.99
Each
units
- Digital Hygrometer 100%RH - 0.1°C ±5 %RH - - - - - - - -
RS Stock No. 187-3782
Mfr. Part No.HP32
$609.43
Each
units
+200°C Digital Hygrometer 100%RH ±0.2 K - ±0.8 %RH - Yes Handheld USB - - Battery Lithium Polymer
RS Stock No. 348-8302
Mfr. Part No.DPDC110000
BrandCarel
$580.04
Each
units
+50°C Thermohygrometer 90%RH ±1.2 °C - ±3 %RH - - - - - - Mains -
RS Stock No. 106-5306
BrandRS PRO
$181.05
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. 187-3783
Mfr. Part No.HP32-S-Set
$974.06
Each
units
+200°C Digital Hygrometer 100%RH ±0.2 K - ±0.8 %RH - Yes Handheld USB - - Battery Lithium Polymer
RS Stock No. 123-2210
BrandRS PRO
$219.34
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. 127-8297
BrandRS PRO
$514.18
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