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  • 471B-1
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  • For air velocity, volume and temperature measurements of clean, dry air
  • Range
    • Air Velocity: 0 to 6000 FPM (0 to 30 m/s)
    • Volumetric Air Flow: 19,999 in selected flow units
    • Temperature: -40 to 212°F (-40 to 100°C)
  • Accuracy
    • Air Velocity: ±3% FS within temperature range of 40 to 90°F (4 to 32°C)
    • Temperature: up tp ±0.5°F (±0.28°C) from 32 to 122°F
  • 8” probe length
  • 28” cable length when retracted and 6” when extended
  • 4.5 digit LCD display
  • 9 V alkaline battery
  • Up to 99 readings may be stored for later retrieval
  • Low battery warning
  • CE approved

What's in the Box

  • 9 volt alkaline battery
  • Sensing probe
  • Wrist strap
  • Custom carrying case


The Dwyer 471B Digital Thermo Anemometer is a versatile dual function instrument that quickly and easily measures air velocity or volumetric flow plus air temperature in imperial or metric units. The 471B includes a high contrast LCD display which shows both selected readings simultaneously. A convenient backlight, which automatically shuts off after 2-1/2 minutes to prolong battery life, provides perfect visibility in low light conditions. The stainless steel probe has a comfortable hand grip and is also etched with insertion depth marks from 0 to 8 inches and 0 to 20 cm. Extruded aluminum housing fully protects electronics, yet is lightweight and comfortable to hold even when taking multiple readings as part of duct traverses. Up to 99 readings may be stored for later retrieval. An integral sliding cover protects sensors when not in use.


This product can be used in the following applications: