Automatic Door Sensor, Motion Sensor, Safety Sensor manufacturer / supplier in China, offering Cnb-204gd 24.125GHz Microwave Module 5 Meters Detection Radar Motion Door Opening Sensor, Canbo 238m Vacant and Occupied Wave to Open Electric Door Lock Wall Switch Kit for Restroom Door Security Systems, Canbo M-238m Dual-Side Induction Door Switch with Audio-Visual Cues Ideal for Airport Subway Station Mall Maternity Rooms and so on.