Photo Switch 1,Output:NPN or PNP,NO/NC; 2.Wiring: ... wires,AC 2/3 wires; 3.CE certification. SG series Photo Switch,Photoelectrical Sensor 1, Principle:photoelectric sensor makes use of ... of objects.The move distance is much large than proximity switch,up to 10m;can drive relay,AC contactor or ... : 086-13217608016(Barbara Guo) 086-13435730867(Peter Liao) SG series Photo Switch,Photoelectrical Sensor