HygroPalm - HP31 - versatile handheld instrument for humidity and temperature

The HygroPalm HP31 is a handheld instrument with a fix Rotronic probe, it is able to perform spot measurements and logging of relative humidity, temperature and psychrometric parameters.

Advantages of the HygroPalm handheld device

  • Relative humidity, temperature and psychrometric calculations
  • Graphical display for graphs and up to 4 values
  • Freely settable visual and audible alarms on every value
  • 64’000 data points memory for time programmable interval logging
  • Long lasting battery (up to 48 h when logging every 30 s)


Mobile inspection and random tests in HVAC, the pharmaceutical industry and building management systems

Scope of delivery

  • HygroPalm HP31 (with fixed probe)
  • Soft Case
  • Micro-USB Cable (computer connection and battery charging)
  • HW4 LITE (no license key needed,3 instruments connected max)
  • Parameters Relative humidity and temperature
    Probes Fixed probe
    Probe application range -10…60 °C | 0…100 %RH
    Device type Handheld device (%RH / °C)
    Functions Spot measurements Time programmable interval logging MIN / MAX / AVG
    Range of application -10…60°C / 0…100%RH (non-cond.)
    Battery Lithium Polymer, 3,7V, 1000 mAh (integrated)
    48h – Logging every 30s, screen off
    10h – Screen always on
    Psychrometric calculations Dew / Frost point (Dp /Fp)
    Wet bulb temperature (Tw)
    Enthalpy (H)
    Vapor concentration (Dv)
    Specific humidity (Q)
    Mixing ratio by weight (R)
    Vapor pressure (E)
    Saturation vapor pressure (Ew)
    Saturation vapor density (SVD)
    Calculation method WMO Standard
    Display refresh rate 1 s (typical)
    Logging interval 1 s…24 h
    Storage capacity 8x8000 data points
    Communication interfaces Micro-USB port, HW4 compatible > V3.9
    Housing ABS, TPR
    IP protection rating IP65
    Storage and transport conditions -10…45°C / 10…90%RH
    Dimensions 160 x 63 x 30 mm
    Weight 185 g

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