Extech Instruments RH300 Hygro-Thermometer Psychrometer
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Rewards: 99 Points

Extech Instruments RH300 Hygro-Thermometer Psychrometer

Measures Humidity, Wet Bulb, Dew Point and Air Temperature


  • Details
  • Specs
  • Reviews
  • 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) and T2-Dew Point
  • Unique sensor cap design twists to closed position for protection during storage
  • Switchable
  • Humidity: 10 to 90%RH
  • Temperature (internal): -4 to 122F (-20 to 50C)
  • Temperature (external): -4 to 158F (-20 to 70C)
  • Dew Point: -90.4 to 122F (-68.0 to 49.9C)
  • Wet Bulb: -6.9 to 122F (-21.6 to 49.9C)
  • Dimensions: 7 x 1.9 x 1in (178.5 x 48.4 x 24.7mm)
  • Weight: 3.3oz (95g)
  • 1 Review

    Review of 90279 Review by JENNIFER
    Review of 90279

    Very fast read, almost instant. Accuracy seems good. Item as described, best choice for this need.

    Posted on 5/28/2011

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