RuiHeng, established in 1996 and headquartered in DongGuan, is one of the largest private-owned enterprises in China specialized in designing, manufacturing, developing and exporting all kinds of high and low voltage electric appliances, such as temperature controller (indicator), thermocouple, shunt, thermocouple wire, thermal resistor, current/voltage meter(panel meter), current divider, gas meters, water meter, KWH meter, automatic nozzle, contactor, relay, circuit breaker, transformer, thermal relays, pushbutton, lightning arrester, dropout fuse, switch, pneumatic, cylinder, cable accessories, power instrument, lighting, doorbell etc.