USB Temperature-Humidity-GPP Data Logger with LCD


USB Temperature-Humidity-GPP Data Logger with LCD

The #HT20 can log the ambient temperature and relative humidity (RH) of an environment for days, weeks or months. Included PC software can also calculate and log dew point and wet bulb temperatures, and absolute humidity levels in units of grains per pound (GPP) or g/kg. The #HT20 is ideal for water damage restoration and process control as well as environmental monitoring.


Best For:



  • One button starts/stops logging without a PC
  • Plug-and-play USB 2.0 interface; no need for cables, cradles or docks
  • Software displays data logs as time-based graphs synchronized to your PC's clock
  • Large storage capacity
  • 3-1/2 digit LCD displays real-time temperature and RH, device working status and "memory full"
  • °F/°C switch
  • One-click exporting of logs to Excel
  • NIST calibration is available
  • Specifications


    • Temperature measurement range: -4° to 158°F (-20° to 70°C)
    • Temperature measurement accuracy: ±1.8°F (±1°C) from 14° to 104°F (-10° to 40°C); ±3.6°F (±2°C) elsewhere in range
    • RH measurement range: 0 to 100%
    • RH measurement accuracy: ±3% from 20 to 80% RH; ±3.5% elsewhere in range
    • Temperature response time: 5 to 30 seconds
    • RH response time: 8 seconds
    • Storage capacity: 16,300 pairs of RH and temperature readings
    • Data logging sampling time: Adjustable from 10 seconds to 12 hours
    • Length of USB extension cable: 7.9 in. (200mm)
    • Weight: 1.41 oz. (40g) without battery
    • Power source: #BA10 "1/2 AA" non-rechargeable Lithium-ion battery (included)


    • PC data logging/interface software on mini-CD
    • USB extension cable
    • #BA10 non-rechargeable "1/2 AA" Lithium-ion battery
    • 1-year limited warranty


    • 4.96 x 1.10 x 2.01 in. (126 x 28 x 51mm)


    Which models of temperature/humidity meters have data logging capability?

    The following models of temperature/humidity meters have data logging capability: HT08, HT20, DL8835, LTH8809DL, LRTH185DL, LRTH185DL1, DTH3007SD, DLAF930SD, HWA2005DL, DAF4207SD, HWA4214SD, RHMG700DL

    What is Dew Point?

    In simple terms, the dew point (dew point temperature or dewpoint) is the temperature at which a given concentration of water vapor in air will form dew. More specifically it is a measure of atmospher...
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    What is Wet Bulb?

    The wet-bulb temperature is the temperature a parcel of air would have if it were cooled to saturation (100% relative humidity) by the evaporation of water into it, with the latent heat being supplied...
    Read more