China M18 Infrared Ray Through-Beam Reflection Optical Photoelectric Switch Sensor 3-Lines NPN No 6-36VDC Proximity Switch Inductive Distance 5m with Mounting Bracket, Find details about China Photoelectric Sensor, Photoelectric Switch from M18 Infrared Ray Through-Beam Reflection Optical Photoelectric Switch Sensor 3-Lines NPN No 6-36VDC Proximity Switch Inductive Distance 5m with Mounting Bracket