... Environment Meter. Sound Meter. Humidity Meter. Volume Meter Digital Air Flow Meter : ***Basic Specifications:♦Temperature Measurement: -10°C~60 ... ,Combined Sound Level Meter, Luminometer, Relative Humidity Meter,Air Flow Meter, Temperature Meter and Anemometer.♦ Built-in low friction ... air velocity in CMM, CFM, m/s, km/h, FPM, knots♦ Built-in precision digital humidity and temperature sensor for ...