PerfectPrime WD9819, Digital LCD Display CFM/CMM Thermo Anemometer Infrared Thermometer Airflow Wind
This meter uses conventional angled vane arms with low-friction ball bearings and an NTC-type thermistor for accurate, speedy readings (1/sec).
It measures air velocity, air flow, and temperature.
Measures velocity in M/sec, Km/H, Ft/Min, MPH, and Knots. Measures air flow in CMM and CFM.
It automatically powers off after 20 minutes to save power. 9V battery required.