Model VP1 100 mm Vane Thermo-Anemometer Probe

Model VP1 100 mm Vane Thermo-Anemometer Probe

Series AP1 Thermo-Anemometer Probe

Series AP1 Thermo-Anemometer Probe

Model 473B 100 mm Vane Thermo-Anemometer Test Instrument

Measures Air Velocity or Air Volume, Temperature, and Humidity Simultaneously

The Model 473B 100 mm Vane Thermo-Anemometer Test Instrument is a versatile unit that quickly and easily measures air velocity or volumetric air flow, as well as air temperature and humidity in imperial or metric units. A stainless steel 100 mm vane probe is included, which has a comfortable hand grip. The extruded aluminum housing fully protects electronics, yet is lightweight and comfortable to hold.

NIST CALIBRATION available in Product Configurator.

Product Applications

  • Residential balancing
  • HVAC inspections
Starting at $591.35
Grouped product items
Model Description Availability* Qty Price
473B-1 100 mm vane thermo-anemometer test instrument 1-3 days*


Dry, clean air.
Temperature Limits:
Process: -20 to 212°F (-29 to 100°C); Ambient: 5 to 125°F (-15 to 51°C).
4.5 digit backlit display.
Air Velocity: 40 to 5000 fpm (0.2 to 25 m/s); Volumetric Air Flow: 19,999 in selected flow units; Temperature: -20 to 212°F (-29 to 100°C); Relative Humidity: 0 to 100% RH.
Air Velocity: ±1.5% of reading ±20 fpm (±0.1 m/s) [0.25 to 10 m/s]; ±1.5% of reading ±40 fpm (±0.2 m/s) [10 to 20 m/s]; ±1.5% of reading ±60 fpm (±0.3 m/s) [20 to 25 m/s]; Temperature: ±0.54°F @ 77°F (±0.3°C @ 25°C); Relative Humidity: ±2% @ 77°F (25°C) [10 to 90% RH]; ±4% [0 to 10, 90 to 100% RH].
Response Time:
Air Velocity: 1 s; Volumetric Air Flow: 1 s; Temperature: 1.5 s; Relative Humidity: 1.5 s.
Probe Length:
8" (203 mm) insertion.
Cable Length:
28" (71 cm) retracted; 6' (183 cm) extended.
Vane Material:
Anodized aluminum.
Power Requirements:
9 V alkaline battery, installed non-functional, user replaceable.
18.4 oz (521 g).


  • Compatible with Dwyer AP1 thermo-anemometer and RP1 thermo-hygrometer wired probes (sold separately)
  • Measure air velocity, volumetric air flow, temperature, and humidity with the included 100 mm vane probe
  • Visible in any condition due to high contrast and backlit LCD display
  • Able to store up to 99 readings for later evaluation

Product Literature


Catalog Pages

Product Data Sheet


Model Chart

EXAMPLE 473B 1 NIST 473B-1-NIST, 473B Digital Thermo-Anemometer, 40 to 5000 FPM (0.5 to 25 m/s) range, NIST calibrated
  40 to 5000 FPM (0.2 to 25 m/s)
Certificate of Calibration
Factory Calibration Certificate
NIST Traceable Calibration Certificate
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Model Description Availability* Price
AP1 Thermo anemometer air velocity & temperature probe with coiled cable, 8" insertion length 1-3 days*
RP1 Thermo hygrometer humidity & temperature probe with coiled cable. 2-3 Weeks*
VP1 100 mm vane thermo-anemometer air velocity, temperature and humidity probe with coiled cable. 1-2 Weeks*
A-47X-BOOT Rubber boot for manometers (manometer not included) 1-3 days*
A-VPX-CKIT Air cone kit, rectangular and circular hoods, for use with the VP1/VP2 1-3 days*