Two-Piece Airflow Volume Anemometer-Psychrometer


Two-Piece Airflow Volume Anemometer-Psychrometer

The #WDCFM8912 airflow volume anemometer is designed to measure the output of exhaust fans and blowers. Its vane-style probe can detect air moving as slowly as 60 ft./min (0.3 m/sec). The meter also measures or calculates airflow volume, relative humidity, and ambient, Dew Point and Wet Bulb temperatures.


Best For:



  • Includes the replaceable #P8912 air speed-temperature-RH probe
  • Min/Max/Avg memory + data hold
  • Single- and multi-point averages
  • Optional #ASFTKIT PC data logging software/hardware is available
  • °F/°C switch
  • Auto power off (can be disabled for data logging)
  • NIST calibration is available


  • Air speed measurement range/accuracy/resolution: 60 to 6840 ft./min (0.3 to 35m/sec)/±2%/0.1 unit
  • Ambient temperature measurement range/accuracy/resolution: -4° to 140°F (-20° to 60°C)/±1°F (±0.6°C)/0.1°
  • Airflow volume measurement range/accuracy: 0 to 1million CFM/CMM)/±5% of reading
  • Airflow volume measurement resolutions: 0.1 CFM/CMM from 0 to 10,000 CFM/CMM; 1 CFM/CMM at and above 10,000 CFM/CMM
  • RH measurement range/accuracy/resolution: 0 to 100%/±3% from 10 to 90%RH; ±5% elsewhere/0.1%RH
  • Dew Point temperature measurement range/resolution: -90° to 158°F (-68° to 70°C)/0.1°
  • Wet Bulb temperature measurement range/resolution: -7.6° to 158°F (-22° to 70°C)/0.1°
  • Auto power off: After 20 minutes of inactivity
  • Operating temperature: 32° to 122°F (0° to 50°C) @<90% RH
  • Weight: 10.4 oz. (295g)
  • Power source: Four "AA" batteries (included) or optional #Z110VADPT AC adaptor


  • #P8912 air speed-temperature-RH probe
  • Custom hard plastic carrying case
  • 1-year limited warranty


  • 6.9 x 2.8 x 1.3 in. (175 x 70 x 33mm)


What is Dew Point?

In simple terms, the dew point (dew point temperature or dewpoint) is the temperature at which a given concentration of water vapor in air will form dew. More specifically it is a measure of atmospher...
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What is Wet Bulb?

The wet-bulb temperature is the temperature a parcel of air would have if it were cooled to saturation (100% relative humidity) by the evaporation of water into it, with the latent heat being supplied...
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What is a psychrometer?

A psychrometer is an instrument that measures both the wet bulb and dry bulb temperatures.