*) Extech 407113 CFM Metal Vane Anemometer

Wind Speed Gauges – Extech 407113 CFM Metal Vane Anemometer

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Extech 407113 CFM Metal Vane Anemometer

Features and Specifications: Extech 407113 CFM Metal Vane Anemometer

  • Metal vane withstands temperatures up to 175?F and airspeed up to 7880 feet/minute
  • Displays air flow (CFM) or air velocity (feet/minute) plus temperature on dual display
  • Choice of readings in feet/min, meters/second, kM/hour, MPH or knots
  • Air flow displayed as instantaneous value, 2/3 value or 20 point average
  • Min/Max function

Metal Vane CFM/CMM Thermo-Anemometer

The Metal Vane Anemometer withstands temperatures to 175°F (80°C) and airspeed to 6890ft/min. The dual LCD simultaneously displays airflow or air velocity plus temperature.

Additional Features

Air Flow can be displayed in three modes: instantaneous value, 20-point average, or 2/3 flow. The built-in RS-232 interface can be used with optional Data Acquisition software (407001) or an optional datalogger (380340) to capture and download measurements to your PC for further analysis.


This product comes with a metal vane sensor with 3.9ft cable, 9V battery, holster, carrying case, and user manual.

How Does An Anemometer Measure Moving Air?

Anemometers measure moving air with a rotary sensor that acts very much like a weathervane and can be likened to the blades of a fan. The vane freely rotates in response to airflow, and as the air moves through the vane the blades turn in proportion to the speed of the air.

What Is CFM / CMM?

Cubic Feet per Minute (CFM) or Cubic Meters per Minute (CMM) are units of measure for air volume measurements. This is a measurement of the quantity of moving air through an air duct, passageway, or enclosure. In order to determine this, the area of the duct must be measured. The area value (in ft2 or m2) is entered by the user, by pushbutton or keypad into the meter and an air velocity is determined.

What Is The Difference Between Vane And Hot-Wire Anemometers?

Vane Anemometers use a remote fan (vane) that freely rotates in response to air flow. The vane movement equates to air velocity readings that can be displayed on a meter. The Hot Wire Anemometer sensor is a special wire whose resistance fluctuations are translated into air velocity readings that can be displayed on a meter.

Which Applications Are Best For Vane And Hot-Wire types?

Hot-Wire Anemometers offer a slim sensor (0.5″ diameter), well suited for accessing small openings and crevices (engine compartments and small ventilating systems). Hot-Wire Anemometers don’t have vulnerable, movable mechanical parts that can wear or become damaged over time. Vane Anemometers are lower cost and allow easy visual inspection of the moving vane (great for air duct and fume hood applications).


  • HVAC installation, repair, diagnostics, and optimization
  • Positive pressure tests in clean rooms
  • Fume hood testing, installation, and verification
  • Automobile engines analysis, passenger compartment tests, and aerodynamic testing
  • Ionizer flow output monitoring
  • Ventilation system installation, servicing, and analysis
  • Environmental wind and temperature testing/analysis
  • Boiler rooms
  • Plant/Facilities Maintenance

Related Product

Metal Vane Thermo-Anemometer/Datalogger

The Metal Vane withstands temperatures to 158°F (70°C) and air velocity to 6900ft/min. The Datalogger date/time stamps and stores readings on an SD card in Excel format for easy transfer to a PC. Adjustable data sampling rate: 1 to 3600 seconds. You can manually store/recall up to 99 readings and automatically datalog up to 20M readings via 2G SD card. Type K/J Thermocouple input for high temperature measurements. Large (9999 count) LCD displays Air Velocity and Temperature simultaneously. 2% velocity accuracy via low friction ball bearing vane wheel on 39″ (1m) cable. Record/Recall MIN, MAX, Data Hold, Auto Power Off. Built-in PC interface. Complete with six AA batteries, SD card, metal vane sensor, and hard carrying case.

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