The TRIPLETT Model CFM400 4 in. (100 mm) Large Vane CFM/CMM Thermo-Anemometer measures Air Velocity up to 5900 ft./min (30 m/s)， Air Flow (Volume) to 99999 CFM/CMM and Air Temperature 140°F/60°C) for use in HVAC System installation and maintenance， cleanrooms， kitchen exhaust systems， wind power monitoring， construction， sailing/boating， vehicle aerodynamics and many other applications. Measurements are displayed on a dual backlit easy-to-read LCD display. Minimum/Maximum recalls highest and lowest readings plus Multi-Point Average and Timed Average modes. Data Hold freezes the reading on the display when taking measurements in areas where the display cannot be easily viewed. The auto power off (with disable) function conserves battery life. Includes 4 AAA batteries and hard carrying case. 1-year warranty.

Measures air velocity， air flow (volume) and temperature

Dual backlit easy-to-read LCD display

Multi-point average and timed average modes

Minimum/maximum recalls highest and lowest readings

Data hold freezes the display

Auto power off with disable