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

Models & Ordering

Shipping Information

All shipping times are dependent on product availability at time of shipment.

Although we make every effort to ensure a continuous supply of our products, occasional circumstances may force us to temporarily run out of a product, or have shipping delays. Should this occur, customers will be notified soon after placement of any orders for such products and, if applicable, items will be put on backorder. For orders requiring expedited shipment, our customer service team can be contacted to confirm product availability

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Model Description Usually Ships* Price Order
Ships: 1-2 Weeks
Price: $367.00
Digital thermo-hygrometer includes 9V battery, sensing probe, wrist strap, hard carrying case and instructions 1-2 Weeks* $367.00 Order

Can't find what you need? Build Your Custom Part. Use our Product Configurator


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).
Agency Approvals:


  • 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


Model Number Description Usually Ships* Price Order
Thermo hygrometer humidity & temperature probe with coiled cable. RP1 Thermo hygrometer humidity & temperature probe with coiled cable. 2-3 Weeks $207.00 Order
Rubber boot for manometers (manometer not included). A-47X-BOOT Rubber boot for manometers (manometer not included). Next Day $16.50 Order


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