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. 777-0440
Mfr. Part No.0560 6230
BrandTesto
TWD6,677.00
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. 412-3062
Mfr. Part No.0560 6081
BrandTesto
TWD2,765.00
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. 724-4193
Mfr. Part No.2418208
BrandFluke
TWD10,136.00
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. 735-6757
Mfr. Part No.0563 6251
BrandTesto
TWD8,842.00
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. 777-0444
Mfr. Part No.0560 6220
BrandTesto
TWD9,619.00
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. 725-9521
Mfr. Part No.HygroPalm HP21
TWD13,471.00
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
New
RS Stock No. 218-4309
Mfr. Part No.EWHS3040-4_20MA
BrandEliwell
TWD11,756.00
Each
units
+60°C - 100%RH - -40°C - - - - - - - - -
New
RS Stock No. 218-4310
Mfr. Part No.EWHS3140-4_20MA
BrandEliwell
TWD15,269.00
Each
units
+60°C - 100%RH - -40°C - - - - - - - - -
RS Stock No. 913-0872
Mfr. Part No.LKM 455
TWD7,408.00
Each
units
- Thermohygrometer - - - - - - - - - - - -
RS Stock No. 155-8900
BrandRS PRO
TWD1,720.00
Each
units
- Digital Hygrometer 100%RH ±0.5 °C 0.1°C ±3 %RH 0.1%RH - - Bluetooth - - Battery 9V
RS Stock No. 292-335
Mfr. Part No.0560 6062
BrandTesto
TWD5,972.00
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. 735-6754
Mfr. Part No.0560 6053
BrandTesto
TWD3,567.00
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. 615-3245
Mfr. Part No.HI9565
TWD9,460.00
Each
units
- Digital Hygrometer - - - - - - - - - - Battery 9V
RS Stock No. 420-7261
Mfr. Part No.0560 6082
BrandTesto
TWD4,374.00
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. 165-1486
BrandRS PRO
TWD590.00
Each
units
+60°C Thermohygrometer 80%RH ±5 % - ±5 % - - Analogue - - Measuring - -
RS Stock No. 123-2230
BrandRS PRO
TWD5,382.00
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. 433-3736
Mfr. Part No.SONDE HS 18 4/20 MA
BrandEliwell
TWD15,008.00
Each
units
+70°C Thermohygrometer - - - - - - - - - - - -
RS Stock No. 913-0876
Mfr. Part No.LKM 456
TWD7,408.00
Each
units
- Thermohygrometer - - - - - - - - - - - -
RS Stock No. 187-3779
Mfr. Part No.HL-20D-SET
TWD18,380.00
Each
units
+60°C Digital Hygrometer 100%RH ±0.3 °C - ±1.3 %RH - Yes Digital UART - - Battery AA
RS Stock No. 136-5501
Mfr. Part No.HC2A-S
TWD12,059.00
Each
units
+100°C Thermohygrometer 100%RH ±0.1 K 0.1°C ±0.5 %RH <1%RH Yes Handheld UART - Measuring - -