Humidity sensor supply

Humidity sensor power metal oxide ceramics , polymers , and the moisture sensitive material such as lithium chloride, DC voltage is applied , it will cause performance changes , or even failure , so this type of humidity sensor can not be a DC voltage or AC voltage with DC component . Must be AC powered . Interchangeability Currently , the humidity sensor widespread phenomenon of poor interchangeability , the same types of Crankshaft Position Sensor are not interchangeable , seriously affecting the results, to maintenance, commissioning increased the difficulty , some manufacturers have made in this regard the efforts ( but interchangeability is still very poor ) and achieved good results . Humidity correction correction correction temperature and humidity is much more difficult than that . Temperature calibration is often used as a standard to a standard thermometer and humidity calibration standards difficult to achieve , wet and dry bulb thermometer and hygrometer some common pointer can not be used for calibration , the accuracy can not be guaranteed , because of its environmental requirements very strict conditions , in general , ( preferably under suitable conditions humidity ) in the absence of the test sound device, usually a saturated salt solution with a simple testing method and measure its temperature.