The hygrometer is psychometric

VIT-1, VIT-2 use in material warehouses and rooms of the closed type. In a feeder of a hygrometer fill in the distilled water. Measurement of relative humidity of air is based on a difference of indications of the "dry" and "humidified" thermometers. After removal of indications of thermometers determine relative humidity of air by the psikhrometrichesky table.