Features Hygrometer

Hygrometers are used to measure the relative humidity of air. The measurement of the hygrometers are based on hygroscopic properties of human hair or synthetic fibres. With increasing moisture content in the air the fibers have a linear extension. The moisture content depending change in length will be transmitted to the pointer with the help of an sensitive mechanism. Hygrometers are often combined with thermometers in many variants for a simultan measurement of relative humidity of air and air temperature