Dwyer Series TAC3 Pocket Tachometer


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Dwyer Series TAC3 Pocket Tachometer

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.


Product Applications

  • Building commissioning
  • Pulp & paper



  • Replaceable probes
  • Hold feature to freeze current readings on the display
  • Stores up to 99 readings for future evaluation



Accuracy: Non-contact: ±0.01% of reading; Contact: ±0.05% of reading; Timer: ±0.2 sec.
Display: Dual LCD display (5 digit upper display / scrolling 5 digit alphanumeric lower display).
Resolution: User-selectable from 0.001 to 1 (10 above 99,999); Timer: 0.1 sec.
Max. Measuring Distance: 25' and up to 70° from perpendicular.
Ambient Operating Temperature: 40 to 105°F (5 to 40°C).
Power Requirements: (2) 1.5 V alkaline batteries, included, user replaceable.
Weight: 7 oz (210 g).
Agency Approvals: CE.


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    • Dwyer Series TAC3 Pocket Tachometer
    • Dwyer Series TAC3 Pocket Tachometer
    • Dwyer Series TAC3 Pocket Tachometer