Shanghai Wafer Microelectronics Co., Ltd. was built up in 2006. We are acknowledged as the leader in the development, manufacturing and distribution of sensor series for automatic doors and coin acceptors for vending machines in our local market. We also get a constant increase in the world market. For automatic door application, Wafer manufactures automatic door sensors, automatic door safety beam sensors, infrared and microwave contactless sensor switches, active and passive infrared ...