Direct reading type hygrometer circuit

Published:2011/5/11 0:01:00 Author:Fiona | Keyword: Direct reading type, hygrometer | From:SeekIC

Illustration is direct reading type hygrometer circuit, including RH for chlorinated hammer humidity sensitive resistor. The power supply's humidity measurement bridge is made up by VT1, VT2 and T1 etc and the power supply's oscillation frequency is 250-1000Hz.Bridge output signal through the transformer T2, C3 coupled to the VT3, and the signal amplified by VT3 enters microammeter after it is bridge rectifiered by VD1-VD4, indicates the relative humidity changeslead to the current changes. By calibrating and Characterizing the humidity on the microampere dial ,it becomea simple and practical direct reading hygrometer. var translatedXML = null;


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