Proximity Sensor, Photoelectric Sensor, Vehicle Loop Detector manufacturer / supplier in China, offering Retro-Reflective Optical Sensor Photoelectric Switch for Object Presence Detection and Counting, Laser Reflective Photoelectric Sensor with 4m Distance for Pallet Positioning Detection, 4m Distance Photoelectric-Sensor Switch NPN PNP with 10-30VDC Power Voltage and so on.