China Rongtech Industrial (Shanghai) Inc., is located in Shanghai, a city famous for its economic prosperity, convenient traffic and elites gathering together here, has been specialized in manufacturing and exporting various sensors, including Inductive switch Sensors, Pressure Sensor, photoswitch, photoswitches, Curre-nt Sensor, Voltage Sensor, Ultrasonic sensor, Air flow Sensor for car & Oxygen Sensor, Displa-cement Sensor and Temperature Sensor. We also can offer some international certificates for some specific products, eg. GS, CE, UL etc. All series of our products, photoswitch, photoswitches with good quality and nice price are confirmed and popular with the worldwide users, the products have been exported far to Europe and America, as well as Sou-thAsia etc.