... 3 wires,AC 2/3 wires; 3.CE certification. SG series Photo Switch,Photoelectrical Sensor 1, Principle:photoelectric sensor makes ... ,PNP(normal open or normal closed,current:100--300mA),relay,logicgate,etc,movement distance within 5cm--10m selectable.4, ... Meter, Counter, Tacho Meter, Frequency Meter, flowmeter,Timer,Timer Relay, Solid State Relay, Proximity Sensor, ,Pressure sensor ,load cell sensor, KNE ...