Hygrometer | Digital Thermo Hygrometer | RS
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    Hygrometers

    A hygrometer measures the humidity and water vapour in the air. A hygrometer measures both humidity and temperature, and it does this by calculating of both air pressure and temperature changes, which results in the moisture's percentage in the air. Used in environments that require constant monitoring of humidity, this could be in food processing where it's imperative that humidity stay at a constant as it could affect production.

    Within a volume of air, the maximum amount of water vapour it can hold varies 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.

    Types of Hygrometers?

    Depending on your requirements, the hygrometer needed is important, some types of hygrometers include:

    • 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.
    • Digital hygrometers offer a modern approach to for easy-to-read measurements and sometimes feature an in built data logger for recording measurements for analysis. Digital thermohygometers feature a digital display, such as the Testo 608-H1 uses an LED display to monitor temperature changes and a capacitive humidity sensor to provide dew-point calculations through the use of a probe. However digital thermohygrometers are available as resistive and capacitive, both have different methods to achieve accurate results.

    What's the difference between a 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.

    Why choose RS for a Hygrometer?

    RS not only has a vast range of hygrometers from leading brands such as Testo, Rotronic Instruments, Fluke and our very own brand RS PRO, but an in house calibration service. This calibration service is to RSCAL and UKAS standards and ensures accurate and reliable measurements.

    71 Products showing for Hygrometers

    Dewpoint Measurement
    +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
    Handheld
    -
    Alarm, Comparator, Data Hold
    Battery
    9V
    1440 h
    Dewpoint Measurement
    +50°C
    Digital Hygrometer
    99%RH
    ±1 °C
    0.1°C
    ±5 %
    -
    0.1%RH
    Handheld
    -
    Data Hold
    Battery
    AAA
    -
    Dewpoint Measurement
    +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
    Handheld
    USB
    Alarm, Comparator, Data Hold
    Battery
    9V
    1440 h
    Dewpoint Measurement
    +140 °F, +60 °C
    Digital Hygrometer
    95%RH
    ±0.5 °C, ±0.9 °F
    0.1 °F, 0.1 °C
    ±3 %RH
    RS1364
    0.1%RH
    Handheld
    -
    Dew Point, Hold, Maximum & Minimum Display, Record, Relative, Wet Bulb
    Battery
    AAA
    200 h
    Dewpoint Measurement
    +140 °F, +60 °C
    Digital Hygrometer
    95%RH
    ±0.8°C, ±1.5°F
    0.1 °C, 0.1 °F
    ±3 %RH
    RS1360A
    0.1%RH
    Handheld
    -
    Dew Point, Hold, Memory, Read
    Battery
    9V
    140 h
    -
    -
    Digital Hygrometer
    99%RH
    -
    -
    ±5 %RH
    TA298
    -
    -
    -
    -
    -
    -
    -
    -
    -
    Digital Hygrometer
    100%RH
    ±0.5 °C
    0.1°C
    ±3 %RH
    RS-91
    0.1%RH
    -
    Bluetooth
    -
    Battery
    9V
    -
    Dewpoint Measurement,Printer
    +1333 (Type2) °C, +140 (Type1) °F, +2431 (Type2) °F, +60 (Type1) °C
    Digital Hygrometer
    95%RH
    ±0.1 %, ±0.8 °C, ±1.5 °F
    0.1 °F, 0.1 °C
    ±3 %RH
    RS1362
    -
    Handheld
    -
    Dew Point, Hold, Maximum & Minimum Display
    Battery
    AAA
    100 h
    -
    -
    Digital Hygrometer
    99%RH
    -
    0.1 °C, 0.1 °F
    ±4 %RH
    RS-325A
    0.1%RH
    Digital
    -
    Measuring
    Battery
    AA
    8 months
    -
    -
    Digital Hygrometer
    99%RH
    -
    0.1°C
    ±3 % HR
    RS1260
    0.1%RH
    -
    -
    Dew Point, Hydrometry, Max/MIN/HOLD, Temperature
    Battery PP3
    9V
    200 h
    -
    +60°C
    Thermohygrometer
    100%RH
    ±0.8 °C
    0.1°C
    ±3.5 %RH
    RS-72TH
    0.1%RH
    Handheld
    Bluetooth, WiFi
    Alarm
    Battery
    1.5 V AAA
    200 h→350 h
    -
    +60°C
    Thermohygrometer
    80%RH
    ±5 %
    -
    ±5 %
    -
    -
    Analogue
    -
    Measuring
    -
    -
    -
    Testo
    -
    +60°C
    Digital Hygrometer
    100%RH
    ±0.4 °C
    0.1°C
    ±2 %RH, ±3 %RH
    Testo 622
    0.1%RH
    Digital
    -
    Maximum & Minimum Display
    Battery
    4 x AA
    1 yr
    Brannan
    -
    +50°C
    Thermohygrometer
    -
    ±0.5 °C
    -
    -
    13/222/3
    -
    Wall Mounted
    -
    -
    -
    -
    -
    KIMO
    -
    +100°C
    Thermohygrometer
    100%RH
    ±0.25 °C
    0.1°C
    ±1.5 %RH
    TH210
    -
    Fixed
    -
    -
    -
    -
    -
    Carel
    -
    +50°C
    Thermohygrometer
    90%RH
    ±1.2 °C
    -
    ±3 %RH
    DPDC110000
    -
    -
    -
    -
    Mains
    -
    -
    Extech
    -
    +80°C
    Digital Hygrometer
    100%RH
    ±4 °F
    -
    ±3
    HT30
    -
    Digital
    -
    -
    -
    -
    -
    Chauvin Arnoux
    Dewpoint Measurement
    +140 °F, +60 °C
    Digital Hygrometer
    98%RH
    0.5 °C ± 1 digit
    0.1 °F, 0.1 °C
    2% RH + 1 digit
    CA 1246
    0.1%
    Digital
    Bluetooth, USB 2.0
    Alarm, Automatic Power-OFF, Backlighting, Data Storage, Min-Max-Hold, Record
    Battery
    AA
    1000 h
    Extech
    -
    +80°C
    Digital Hygrometer
    99%RH
    -
    0.1°C
    ±3
    HT200
    -
    Digital
    -
    -
    -
    -
    -
    Testo
    Dewpoint Measurement
    +1370°C
    Digital Hygrometer
    100%RH
    ±0.3 °C
    0.1°C
    -
    Testo 635-2
    0.1%RH
    -
    USB
    -
    Battery
    AA
    200 h
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