Seller kathysiwei

zhejiang siwei electric co., ltd. is a high-tech enterprise, which professional in research & development, production and service of instrument & meters, industrial control and electron. our company mainly produces the following products: temperature controllers, thermocouples, thermal resistor sensors, relays, and so on, which are widely applied to scientific research, metallurgy, petrol, chemical engineering, light & textile industry, plastic, food, energy saving, etc.. with strong r&d ability, experienced engineers, advanced producing equipments and reliable inspecting equipments, siwei has successfully awarded iso9001-2000 quality system certificate and ce. certificate, its products are widely sold both in domestic and overseas. swj1 series electronic multi-function productive device is the latest electric protective relay, which is “the patented product, domestic origination”, that according to chinese power grid situation , using self-developed core technology, advanced production techniques, the quality of products are stability with a variety of practical functions. having got national utility model patent (patent no.:zl99251171), it has become the updating products of common thermal relays.