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  • 485B-1
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  • Relative Humidity
    • Range: 0 to 100% (non-condensing)
    • Accuracy: ±2% FS over 10 to 90% @ 77°F (25°C)
    • Resolution: 0.1%,
  • Temperature
    • Range: -20 to 140°F (-28 to 60°C)
    • Accuracy: ±0.9°F @ 72°F (±0.3°C @ 25°C)
    • Resolution: 0.1 °F/°C
  • 4.5 digit LCD display
  • Probe Length: 8" insertion
  • 9V alkaline battery, user replaceable
  • CE approved

What's in the Box

  • 9V battery
  • Sensing probe
  • Wrist strap
  • Soft carrying case
  • Instructions


The Dwyer 485B digital thermo-hygrometer is a versatile, compact, hand-held instrument for measuring percentage of relative humidity and temperature in °F or °C. Dew point and wet bulb temperature is derived from relative humidity and temperature measurements and displayed on the LCD. Hold key freezes the current temperature and relative humidity readings for situations where readings fluctuate. Store up to 99 readings with the nonvolatile memory function – ideal for technicians needing to take multiple readings for later analysis.


This product can be used in the following applications: