Extech Extech 407119 Heavy Duty CFM Hot Wire Thermo-Anemometer

Style:Standard Product Description Complete with vane sensor with 3.9ft (120cm) cable, 9V battery, protective rubber holster, and carrying case. 3% velocity accuracy via low friction 2.83"D (72mm) ball bearing vane wheel on 3.9ft (120cm) cable. Up to 8 easy to set Area dimensions (ft 2 or cm2) are stored in the meter's internal memory. From the Manufacturer Heavy Duty CFM Hot Wire Thermo-Anemometer uses a telescoping probe (extends up to 3-Foot) that's ideal for use in ducts and ventilating systems. It can accurately measure Air Flow (CFM/CMM), Air Velocity and Temperature. Air Flow can be displayed as an instantaneous value or up to a 20 point average. Additional functions include: Data Hold, Min/Max, and Auto power off. A built-in RS-232 interface can be used with optional Data Acquisition software and cable for recording measurements directly to your PC. Comes complete with telescoping probe with 5.5-Foot cable and 4 AA batteries.