Photoresistor: Photoresistor is a resistor for resistance made by semiconductor photoelectric effect increases with the value of the incident light intensity change;① the UV photosensitive resistor: sensitive to UV, including CDs, CdSe photosensitive resistor, ②the infrared photosensitive resistor: the main PBS, PbSe PbTe. InSb etc. photosensitive resistor, ③ the visible light photosensitive resistor: include selenium, cadmium sulfide, cadmium selenide, cadmium telluride, gallium arsenide, silicon, germanium, zinc sulphide photoresistor etc..
①For detection of ultraviolet. ②Widely used for missile guidance, astronomical detection, non-contact measurement, human lesion detection, infrared spectroscopy, infrared communication such as national defense, scientific research and production of industry and agriculture. ③Mainly used for a variety of photoelectric control system, such as automatic switch portal photoelectric, beacon lights, street lamps and other lighting systems for automatic light out, automatic feed and automatic water supply device.