Waloong Electric Instruments Co. , Ltd is a manufacturer of proximity sensor, photoelectric sensor, solid state relay, switching power supply, temperature controller, thermostat, thermocouple, thermometer, ETC. All of products have passed CE approval and ISO9001. The main products of Waloong are: temperature controller, thermocouple, thermal tesistance and so on. The products are widely used in scientific research,metaullurgy, pertroleum, chemistrical industry, textile, palstic, food, energy-saving fields and so on.