上海四达电子仪表有限公司成立于1987年，为国内首家引进生产美国内磁式仪表的生产厂家，专精於模拟与数位式万用表之研发设计与量产，已有20年的悠久历史，积累了丰富的设计、生产经验与实力。工厂座落於国家级松江工业区，是国外许多著名品牌与专业仪表公司的OEM/ODM合作伙伴。

产品规格齐全，涵盖智能表，指针式万用表，数字式万用表，钳形表，兆欧表，教育表，板表，电池表和测电笔等系列。公司通过ISO9001/2000国际质量体系认证，部分产品通过了UL，ETL ，CE/LVD认证和RoHS测试。
Established in 1987, SHANGHAI SDAR ELECTRONIC INSTRUMETNS CO., LTD. worked together with A.W. SPERRY to develop inside-magnetism meters and succeeded in the trial research and production. Therefore, we are the first company in China that brings in this American technology. In the first year of its establishment, the output of model SP -5A of WENZHOU LUCHENG SDAR ELECTRONIC INSTRUMENTS CO., LTD. has achieved 150,000, which has broken the producing record of meters in China . Thereafter, we brought in the series of SP-5B, SP-BT, SP -20A etc, some of which are still in production.
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Our company was establised in 1987. At the beginning we developed the Inside Magnetism Meters with cooperation of A.W. SPERRY. It is the first Chinese company to apply the American technology. In the first year the model SP-5A has produced 300,000. It broke the size of production record at that time. Since then we developed a series of product such as SP-5B, SP-BT, SP -20A etc. Some of them are still avaible.