EXTECH AN300 Large Vane CFM/CMM Thermo-Anemometer


Measures Air Velocity, Air Flow and Temperature

Extech’s AN300 10cm Large Vane Thermo-Anemometer series allows for more precise readings on larger size ducts. Each meter simultaneously displays Airflow or Air Velocity and Temperature. Choose models that also measure Air Volume, Humidity & Carbon Dioxide (CO2).



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  • 4″ (10cm) vane allows for more precise readings on larger size ducts
  • Air Velocity, Air Flow and Temperature
  • Built-in thermistor for air temperature
  • Multipoint and timed average calculations
  • Min/Max, Data Hold, and Auto power off
  • Complete with four AAA batteries and hard carrying case

Authorised Australian Distributor

CE   1 Year

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SKU: EXTECH AN300 Category: Tags: ,

 EXTECH AN300 Large Vane CFM/CMM Thermo-Anemometer

This Extech AN300 measures Air Velocity, Air Flow (volume), and Air Temperature. The large, easy‐ to‐read backlit LCD includes primary (upper) and secondary (lower) displays plus numerous status indicators. The optional cone and funnel airflow adaptors allow for quick volume measurements. This meter is shipped fully tested and calibrated and, with proper use, will provide years of reliable service. Please visit the Extech Instruments website (www.extech.com) to check for the latest version of this User Guide, Product Updates, and Customer Support.

Product Type Airflow Meter
Temp resolution 0.1°F/C
Volume range 0 to 99,999 ft3/min (m3/min)
Volume resolution 0.1 up to 9999.9, then 1.0
Temp range -4 to 140°F (-20 to 60°C)
Temp accuracy ±1.1°F from -5 to 122°F, ±2.2°F from 123 to 140°F (±0.6°C from -20 to 50°C, ±1.2°C from 51 to 60°C)
Model AN300
Qty/ea 1
Manufacturer number AN300
Brand Extech
Air velocity range 40 to 5900 ft/min (0.2 to 30 m/s)
Air velocity resolution 1 ft/min (0.01 m/s)
Air velocity accuracy ±1.5% rdg + 59 ft/min (±1.5% rdg + 0.3 m/s)
Display Dual-function 4-digit LCD, 1/2″ (13 mm)
Dimensions 10 5/8″ x 4 1/4″ x 2″ (269 x 106 x 51 mm)
Power Four AAA batteries
Weight 2 kg


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