... Photo Switch,Photoelectrical Sensor 1, Principle:photoelectric sensor makes use of inspected object’s sheld and reflection to infrared lights, ... choose by synchronous circuits to detect the existance of objects.The move distance is much large than proximity switch ... ,Timer Relay, Solid State Relay, Proximity Sensor, ,Pressure sensor ,load cell sensor, KNE KSC box, Rotary Encoder and ...