Not in stock. Usually ships in 4-6 business days [?]

Need Help? Call 1-800-884-4967
Mo-Th 8am to 5:30pm. Fr 8am to 5pm ET


  • Air Velocity
    • Range: 80 to 6900 ft/min (0.4 to 35 m/s)
    • Accuracy: ±2% of reading or last significant digit (whichever is greater)
    • Resolution: 1 ft/min (0.01 m/s)
    • Response Time: 1 second
  • Air Volume
    • Range: 9999 (CFM, m³/s)
    • Accuracy: ±2% of reading or last significant digit (whichever is greater)
    • Resolution: 0.1 (0 to 999.9) or 1 (1000 to 9999)
    • Response Time: 1 second
  • Temperature
    • Range: 14 to 122°F (-10 to 50°C)
    • Accuracy: ±1°F (±0.6°C)
    • Resolution: 0.1°F/°C
    • Response Time: 60 seconds
  • LCD Size: 1-1/4 x 1-5/8"
  • Serial Communications: 2400 bps, 8 data bits
  • Power Requirements: 9 V alkaline battery included, user replaceable
  • Battery Life: 100 hours (approx.)
  • Vane Diameter: 2-7/8" (70 mm)
  • CE approved

What's in the Box

  • 9v alkaline battery
  • Carrying case
  • Instruction manual

The Dwyer 8901 Vane Thermo-Anemometer is ideal for balancing air conditioning and heating ducts or checking the operation of fans and blowers. The 8901 measures air volume in cubic feet per minute and cubic centimeters per second, as well as air velocity in ft/min, m/s, knots, km/hr and mph with ±2% accuracy. The multifunction LCD can simultaneously display air velocity and temperature or air flow and temperature in selectable units. A built-in temperature sensor provides measurements with an accuracy of ±2 with the capability to display the results in °F/°C. The Dwyer 8901 can either store measurements or transfer the data to a PC via RS-232 communication. Additional features include data hold, as well as the ability to record minimum, maximum and average readings. These units also feature a detachable probe for easy replacement, if necessary.

Dwyer A-550 Vane Probe
Replacement vane probe for Dwyer 8901 thermo-anemometer
Dwyer A-552 Cable and Software
USB cable and RS-232 software for Dwyer thermo-anemometers