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.

Our company always carries out the quality policy of "Today quality, Tomorrow marker". Because of this, the enterprise obtained fast development and has risen rapidly and the products are sold well all over the country and exported to Southeast Asian countries.

Our company will still insist on advanced technology, top product, considerate service and reasonable price services to our customers; Adhere to the "people-oriented" culture ideas. We will make tireless efforts in order to construct the company into a modernized enterprise with scientific management, leading technology, and the first-class benefit!