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,sliding door,swing gate,swing door,revolving door,sliding gate,garage door and supply the safety for the supermarket,business centre,transport station,hospital and so on.