The Climomaster Velocity, Temp & RH Probe 6531-2G from Kanomax accurately measures air velocity, air temperature and relative humidity when attached to the Climomaster Hot Wire Anemometer. This probe is uni-directional and is capable of measuring air velocity from 20 to 6000 fpm, temperature from -4 to 158 °F, and relative humidity from 2.0 to 98.0% RH. Because the 6531-2G is uni-directional, the wind direction mark located at the tip of the probe must be faced into the air flow to obtain accurate air velocity measurements.