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

Technical Data sheet User manual Simplified manual
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
Si-HVACR Measurement Mobile App
Si-HVACR Measurement Mobile App