Rongtech Industry (Shanghai) Inc., is located in Shanghai, a city famous for its economic prosperity, convenient traffic and elites gathering together here, has been specialized in man-ufacturing and exporting various sensors, Curre-nt Sensor, Voltage Sensor, FRED diode modules,Rectifier bridge diode modules, IGBT modules and busbar products. We also can offer some international certificates for some specific products, eg. GS, CE, UL, etc.