Anemometer CFM/CMM

Extech AN100 Large Vane CFM/CMM Thermo-Anemometer

Simultaneous display of ambient climate data and airflow volume for heavy-duty industrial HVAC diagnostics.

The Extech AN100 is an essential diagnostic instrument for HVAC technicians, facility engineers, and system installers who require highly accurate, simultaneous measurements of air velocity, airflow volume, and ambient temperature. Equipped with a large, low-friction, ball-bearing vane wheel attached via a flexible 1.2-meter cable, this professional meter allows for easy access to air ducts, ventilation grilles, and hard-to-reach exhaust ports.

Its advanced microprocessor directly calculates and displays airflow volume in cubic feet per minute (CFM) or cubic meters per minute (CMM), alongside air temperature, making air balancing and ductwork performance analysis efficient and precise.

Key Technical Capabilities

• Direct Flow Volume Computation: Instantly computes volumetric flow rates across CFM and CMM ranges by allowing technicians to input the exact surface area of the duct or grille.

• Large Remote Vane Sensor: Built with a low-friction 72mm ball-bearing vane wheel that guarantees high sensitivity and precision across varying wind speeds.

• Averaging Modes for Turbulent Flow: Features internal memory capable of logging a continuous 20-point average for both airflow velocity and volumetric flow, delivering steady readings in fluctuating environments.

• Dual-Line Backlit Display: A highly readable screen simultaneously shows air velocity or volume alongside temperature, ideal for dim basements or ceiling plenums.

• Data Logging Features: Provides standard data hold functions alongside minimum and maximum value recording to capture peak velocities during active testing.

Technical Specifications Summary