Extech, Hygro-Thermometer Psychrometer RH300

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Extech, Hygro-Thermometer Psychrometer RH300
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Item#: RH300


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  • The Extech, Hygro-Thermometer Psychrometer (RH300) is an External Probe that takes Temperature measurements for differential
  • Calculates T1-T2 differential (Air Temperature minus External Probe Temperature)


  • Simultaneous display of %RH, Temperature and Dew point or Wet Bulb or Probe Temperature
  • Wet bulb measurements without slinging
  • Calculates T1-T2 differential (Air Temperature minus External Probe Temperature) using optional probe (TP890) & T2-Dew Point
  • Unique sensor cap design twists to closed position for protection during storage
  • Switchable °F/°C temperature units with 0.1° resolution
  • Data Hold freezes current reading on display
  • Max/Min readings
  • Auto power off to save battery life
  • 2 AAA batteries included


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