Shanghai Wafer Microelectronics Co.,Ltd,built up in 2004, is specialized in research and development of the automatic door sensor,safety beam sensor,remote control system,microwave and infrared contactless switch,vehicle loop detector,active and passive infrared sensor control system. Wafer products have got a good market share not only in the Chinese market,but also in the world market ,and they are now widely used in the automaitc door ,supermarket,business centre,transport station,hospital and so on. Products such as automatic door sensors, microwave sensors,safety beam sensor,infrared sensor,infrared contactless switch,microwave contactless switch,door bell ,program switch,vehicle loop detector and remote control system manufactured by Wafer can be used to meet those challenges. The integration of electronic sensor technology is easily achieved in these applications: automatic sliding door, revolving door, industrial door, industrial garage door, industrial safety equipment, motion control and detect system and machine control. Our society has come to expect high levels of safety and comfort automatic door and gate system. Companies take measures to avoid occupational hazard and ensure workplace safety, building owners and transit authorities need to ensure the safety of the general public entering or leaving buildings, buses or trains through an automatic door.