- Shanghai Luheng Instrument Co., Ltd.
- Address:Building 151,Lanting Road,Shanghai, China
- Zhongshan Sani Measuring Instruments Company Limited
- Address:No. 98 Shenli Road, Tanzhou Town
- Shanghai Ruosull Technology Co., Ltd.
- Address:Rm 903, No.7. Lane 251, Songhua Jiang Road
- Beijing Huakeyi Power Plant Instrument Research Institute
- Address:No.9 industrial park,Shahe Town,Changping District,Beijing 102206, China
- Shanghai San-Xin Instrumentation Factory
- Address:3/F, 4/B, No. 471 Guiping Road, Shanghai City. China
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