DEVELOPMENT OF A PSYCHROMETER FOR INDUSTRIAL USE

Abstract

This dissertation deals with the design and develop-ment of an electronic psychrometer for the measurement of humidity. Thermistors have been used as basic temperature sensing elements. One thermistor has been used as dry bulb thermometer and the other thermister as wet bulb thermometer. TYe changes in the thermistors resistance values have been processed using astable multivibrator circuits. The output of the system has been given to a digital display unit. Existing material on relative humidity measurement has been reviewed in earlier part of the dissertation..