The Extech 407119 Heavy Duty CFM Hot Wire Anemometer accurately measures air flow (CFM/CMM) or air velocity plus °F/°C temperature. The unit takes air velocity measurements as low as 40ft/min and has 20 point averaging for airflow. The Anemometer's telescoping probe (extends up to 4ft) is ideal for use in ducts and ventilating systems. Features include Data Hold, Auto power off, Record and Recall MIN/MAX readings, and built-in RS-232 PC interface.
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