• VT-300
  • Usually ships in 7-10 business days



  • Air Velocity/Flow, RH, and Temperature
  • Air velocity:
    • Range: 98.4 to 3937 ft/min (0.5 to 20 m/s)
    • Accuracy: ±3% of reading + 0.2 m/s
  • Temperature:
    • Range: -4 to 140°F (-20 to 60°C)
    • Accuracy: ±1°F
  • Relative Humidity:
    • Range: 0.1 to 99.9% RH
    • Accuracy: ±3% RH at 25°C
  • Air volume range: 0 to 99,999 (CFM or m3/s)
  • Wet buld range -7.6 to 158°F (-22 to 70°C)
  • Traverse ducts up to 20in
  • Built-in data logging

What's in the Box

  • Hard case
  • Batteries
  • Software


The Dwyer VT-300 Miniature Vane Thermo Anemometer measures air velocity, air volume, temperature, and humidity inside air ducts. This meter includes a telescoping vane probe that is only 0.7" (18 mm) in diameter that allows duct traverse measurements up to 20in ducts. User-selectable units include ft/min, m/s, knots, mph, and km/hr. The vane probe has a built-in sensor to record temperature in °F or °C, as well as humidity in %RH. There are three modes which include viewing data in real time, manual recording, and automatic recording. Model VT-300 can store measurements that can later be transferred to a PC via RS-232 communication. The vane probe is detachable for easy replacement, if necessary. Each unit is supplied with a hard carrying case, batteries, logging software CD, USB to RS-232 cable and instruction manual.

Applications for the VT-300 include:

  • Building commissioning
  • Building HVAC test and balance
  • Critical environment testing
  • Industrial process verification
  • Instrumentation validation