... . SG series Photo Switch,Photoelectrical Sensor 1, Principle:photoelectric sensor makes use of inspected object’s sheld and reflection to infrared lights, ... ),relay,logicgate,etc,movement distance within 5cm--10m selectable.4, Wiring:DC 2/3 wires,AC 2/3 wires ... ,Timer,Timer Relay, Solid State Relay, Proximity Sensor, ,Pressure sensor ,load cell sensor, KNE KSC box, Rotary Encoder and computer integrated ...