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. 732-0610
Mfr. Part No.0572 6172
BrandTesto
HK$2,135.21
Each
units
+70°C 100%RH ±0.3 °C - ±2 %RH - - - - - - - - -
RS Stock No. 516-0573
Mfr. Part No.0563 6352
BrandTesto
HK$4,335.76
Each
units
+1370°C 100%RH ±0.3 °C 0.1°C - 0.1%RH Yes - USB - - Battery AA 200 h
RS Stock No. 433-3742
Mfr. Part No.SONDE HS 18 0/10 VCC
BrandEliwell
HK$1,956.01
Each
units
- - - - - - - - - - - - - -
RS Stock No. 913-2585
Mfr. Part No.0560 1605
BrandTesto
HK$763.62
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. 187-3780
Mfr. Part No.HL-20D
HK$3,203.20
Each
units
+60°C 100%RH ±0.3 °C - ±1.3 %RH - Yes Digital UART - - Battery 1.5 V AA Alkaline 13 month
RS Stock No. 187-3784
Mfr. Part No.HC2A-WIN-USB
HK$3,832.40
Each
units
+100°C +100%RH ±0.1 K - ±0.8 %RH - Yes Handheld UART - Alarm Mains - -
RS Stock No. 123-2230
BrandRS PRO
HK$1,292.72
Each
units
+60 °C, +140 °F 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. 777-0444
Mfr. Part No.0560 6220
BrandTesto
HK$2,354.47
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. 668-0845
Mfr. Part No.TH-1
BrandAmprobe
HK$834.01
Each
units
+50°C 100%RH ±0.6 °C 0.1°C ±4 %RH 0.1% Yes - - - Hold Battery CR2032 150 h
RS Stock No. 155-8900
BrandRS PRO
HK$450.51
Each
units
- 100%RH ±0.5 °C 0.1°C ±3 %RH 0.1%RH - - Bluetooth - - Battery 9V Battery -
RS Stock No. 136-5501
Mfr. Part No.HC2A-S
HK$2,870.87
Each
units
+100°C 100%RH ±0.1 K 0.1°C ±0.5 %RH <1%RH Yes Handheld UART - Measuring - - -
RS Stock No. 123-2233
BrandRS PRO
HK$1,441.44
Each
units
+60 °C, +140 °F 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 200 h
RS Stock No. 913-0879
Mfr. Part No.LKM 446
HK$1,180.26
Each
units
- - - - - - - - - - - - - -
RS Stock No. 187-3775
Mfr. Part No.HC2-C04
HK$5,994.56
Each
units
+200°C 100%RH ±0.1 K - ±0.8 %RH - Yes Analogue UART - - Mains - -
RS Stock No. 123-2232
BrandRS PRO
HK$3,308.00
Each
units
+60 (Type1) °C, +140 (Type1) °F, +1333 (Type2) °C, +2431 (Type2) °F 95%RH ±0.1 %, ±0.8 °C, ±1.5 °F 0.1 °C, 0.1 °F ±3 %RH - Yes Handheld - Yes Dew Point, Hold, Maximum & Minimum Display Battery AAA 90 h, 100 (Except Printing & Beeper) h
RS Stock No. 913-0876
Mfr. Part No.LKM 456
HK$1,567.39
Each
units
- - - - - - - - - - - - - -
RS Stock No. 187-3782
Mfr. Part No.HP32
HK$3,174.41
Each
units
+200°C 100%RH ±0.2 K - ±0.8 %RH - Yes Handheld USB - - Battery Lithium Polymer 48 h
RS Stock No. 127-8297
BrandRS PRO
HK$1,917.23
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 NEDA 1604, 006P 9V 2 month
RS Stock No. 433-3736
Mfr. Part No.SONDE HS 18 4/20 MA
BrandEliwell
HK$3,591.13
Each
units
- - - - - - - - - - - - - -
RS Stock No. 165-1486
BrandRS PRO
HK$129.18
Each
units
+60°C 80%RH ±5 % - ±5 % - - Analogue - - Measuring - - -