Model RP3 Thermo-Hygrometer Probe

Model RP3 Thermo-Hygrometer Probe

Model 485B Thermo-Hygrometer

Measures % RH, Temperature, Dew Point and Wet Bulb

The Model 485B Thermo-Hygrometer is a versatile, compact, handheld instrument for measuring percentage of relative humidity and temperature in °F or °C. Dew point and wet bulb temperatures are derived from the relative humidity and temperature measurements and are displayed on the LCD.

NIST CALIBRATION available in Product Configurator.

Product Applications

  • Building commissioning
  • Pulp & paper
Starting at $386.00
Grouped product items
Model Description Availability* Qty Price
485B-1 Digital thermo-hygrometer includes 9V battery, sensing probe, wrist strap, hard carrying case and instructions 1-2 Weeks*


Humidity, temperature, wet bulb and dew point temperature detection in clean air.
Temperature Limits:
Process: -40 to 176°F (-40 to 80°C); Ambient: 5 to 125°F (-15 to 51°C).
Relative Humidity Range:
0 to 100% (non-condensing).
Relative Humidity Accuracy :
±2% FS over 10 to 90% @ 77°F (25°C).
Temperature Range :
-20 to 140°F (-28 to 60°C).
Temperature Accuracy :
±0.9°F @ 77°F (±0.5°C @ 25°C)
4.5 digit LCD.
0.1%, 0.1 °F/°C.
Probe Length:
8" (203 mm) insertion.
Power Requirements:
9 V alkaline battery, included, user replaceable.
16 oz (454 g).


  • Compatible with Dwyer AP1 thermo-anemometer and VP1 100 mm vane thermoanemometer probes (sold separately)
  • Hold feature to freeze current readings on the display
  • Stores up to 99 readings for future evaluation

Product Literature


Catalog Pages

Product Data Sheet

Model Chart

MODEL 485B Thermo-Hygrometer
          1ST SYMBOL (1ST X) RANGE
             1    0 to 100% (Non-Condensing)
          OPTIONS (OPT)
            -NIST  NIST Traceable Calibration Certificate
Write Your Own Review
Only registered users can write reviews. Please Sign in or create an account
Model Description Availability* Price
RP1 Thermo hygrometer humidity & temperature probe with coiled cable. 2-3 Weeks*
A-47X-BOOT Rubber boot for manometers (manometer not included) 1-3 days*