Proximity Sensor, Photoelectric Sensor, Vehicle Loop Detector manufacturer / supplier in China, offering 20m Infrared Opposite Optical Sensor for Flap Barrier Turnstile Gate, Safety Infrared Light Barrier Curtain Sensor for Subway Station Security, 10-30V 0.1-4m PNP Retro-Reflective Photocell Sensor with Wholesale Price and so on.