The Amprobe TMA40-A allows three measurements with one instrument: air velocity or volume, relative humidity and temperature. The device provides three ways to view measurement results: by one point, by several points (up to 99), as well as the ability to record data up to 2400 data points. The user sets the measurement interval from 1 to 200 seconds. The TMA40A has a flexible cord for measurements in hard-to-reach places.