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. 913-0879
Mfr. Part No.LKM 446
$276.66
Each
units
- Thermohygrometer - - - - - - - - - - - -
RS Stock No. 516-0573
Mfr. Part No.0563 6352
BrandTesto
$777.53
Each
units
+1370°C Digital Hygrometer 100%RH ±0.3 °C 0.1°C - 0.1%RH Yes - USB - - Battery AA
RS Stock No. 777-0444
Mfr. Part No.0560 6220
BrandTesto
$516.02
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. 913-0876
Mfr. Part No.LKM 456
$367.42
Each
units
- Thermohygrometer - - - - - - - - - - - -
RS Stock No. 913-0872
Mfr. Part No.LKM 455
$371.03
Each
units
- Thermohygrometer - - - - - - - - - - - -
RS Stock No. 348-8289
Mfr. Part No.DPWC110000
BrandCarel
$337.11
Each
units
+50°C Thermohygrometer 90%RH ±1.2 °C - ±3 %RH - - - - - - Mains -
RS Stock No. 735-6754
Mfr. Part No.0560 6053
BrandTesto
$191.35
Each
units
+50°C Digital Hygrometer 95%RH ±0.5 °C 0.1°C ±3 %RH 0.1%RH Yes - - - Hold Battery AAA
RS Stock No. 913-0860
Mfr. Part No.LKM 445
$271.24
Each
units
- Thermohygrometer - - - - - - - - - - - -
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 USB - Alarm, Comparator, Data Hold Battery 9V
RS Stock No. 187-3783
Mfr. Part No.HP32-S-Set
$906.95
Each
units
+200°C Digital Hygrometer 100%RH ±0.2 K - ±0.8 %RH - Yes Handheld USB - - Battery Lithium Polymer
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. 123-2230
BrandRS PRO
$275.88
Each
units
+60 °C, +140 °F 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
$295.08
Each
units
+60 °C, +140 °F Digital Hygrometer 95%RH ±0.5 °C, ±0.9 °F 0.1 °C, 0.1 °F ±3 %RH 0.1%RH Yes Handheld - - Dew Point, Hold, Maximum & Minimum Display, Record, Relative, Wet Bulb Battery AAA
RS Stock No. 187-3779
Mfr. Part No.HL-20D-SET
$879.77
Each
units
+60°C Digital Hygrometer 100%RH ±0.3 °C - ±1.3 %RH - Yes Digital UART - - Battery AA
RS Stock No. 191-9564
Mfr. Part No.082.034A
BrandLaserliner
$53.30
Each
units
- Digital Hygrometer 99%RH - - ±2 %RH - - Digital - - Dew Point Battery LR44
RS Stock No. 187-3784
Mfr. Part No.HC2A-WIN-USB
$722.36
Each
units
+100°C Thermohygrometer +100%RH ±0.1 K - ±0.8 %RH - Yes Handheld UART - Alarm Mains -
RS Stock No. 187-3782
Mfr. Part No.HP32
$567.11
Each
units
+200°C Digital Hygrometer 100%RH ±0.2 K - ±0.8 %RH - Yes Handheld USB - - Battery Lithium Polymer
RS Stock No. 165-1486
BrandRS PRO
$28.86
Each
units
+60°C Thermohygrometer 80%RH ±5 % - ±5 % - - Analogue - - Measuring - -
RS Stock No. 191-9557
Mfr. Part No.BLD7750
BrandProtimeter
$1,024.24
Each
units
- Digital Hygrometer 98%RH - - ±2 % - - Handheld Bluetooth - Dew Point Battery 9V
RS Stock No. 187-3780
Mfr. Part No.HL-20D
$603.77
Each
units
+60°C Digital Hygrometer 100%RH ±0.3 °C - ±1.3 %RH - Yes Digital UART - - Battery AA