The palm-sized Sauermann Si-HH3 thermo-hygrometer easily measures relative humidity and temperature.

Backlit LCD screen
Calculated values on mobile App (free)
Magnetic backing for easy fixing
Carrying bag

    Measure details

    • Units
      °F, °C, % RH, °Ctw, °Ctd, °Ftd, °Ftw, g/m³, g/kg, kj/kg
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    Measuring ranges

    • Relative humidity
      0.00 % RH ... 100.00 % RH
    • Dew point
      -40.00 °Ctd ... 60.00 °Ctd
    • Absolute humidity
      0.00 g/m³ ... 600.00 g/m³
    • Temperature
      -20.00 °C ... 60.00 °C
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    Technical details

    • Parameters
      Humidity
      Temperature
    • Displays
      2-line display
    • IP Protection
      IP 20
    • Battery life
      250 hours
    • Standards
      RoHS II 2011/65/EU (EU)2015/863
      UKCA
      2012/19/UE DEEE
      2014/53/EU RED
    • Wireless connection
      1
    • Power supply
      3 alkaline batteries LR03 AAA 1.5 V
    • Probe type
      Built-in probe
    • Protective cover
      No
    • Interchangeable module
      No
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    Instrument Dimensions

    • Length
      2 3/4 inches
      70 mm
    • Width
      1 5/16 inches
      33 mm
    • Height
      8 31/32 inches
      228 mm
    • Weight
      7 pounds
      200 g
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    Operating temperature

    • Min
      -10.00 °C
    • Max
      60.00 °C
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    Storage temperature

    • Min
      -20.00 °C
    • Max
      70.00 °C
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    1 Certificate of conformity
    1 Quick Start Guide
    3 Alkaline batteries LR03 AAA 1.5 V
    1 Carrying bag