| CHI INSTRUMENTATION LIMITED | Private company limited by shares | Live |
| HK HUINENG AUTOMATION INSTRUMENTATION LIMITED | Private company limited by shares | Dissolved |
| CAMBRIDGE RESEARCH & INSTRUMENTATION (CHINA) LIMITED | Private company limited by shares | Live |
| WASSON-ECE INSTRUMENTATION (CHINA) INC LIMITED | Private company limited by shares | Live |
| WUXI BOER POWER INSTRUMENTATION (HK) CO., LIMITED | Private company limited by shares | Live |
| HK ELECTRICAL INSTRUMENTATION TRADE CO., LIMITED | Private company limited by shares | Dissolved |
| Fresnel Instrumentation (Hong Kong) Limited | Private company limited by shares | Live |
| General Instrumentation Limited | Private company limited by shares | Live |
| GEOTECH INSTRUMENTATION LIMITED | Private company limited by shares | Dissolved |
| HUIZHONG INSTRUMENTATION (HONG KONG) CO., LIMITED | Private company limited by shares | Live |
| WASSON-ECE INSTRUMENTATION (HONGKONG) CO., LIMITED | Private company limited by shares | Live |
| INNOTECH INSTRUMENTATION CO., LIMITED | Private company limited by shares | Live |
| LIAD INSTRUMENTATION HONGKONG LIMITED | Private company limited by shares | Live |
| Pan-Communication Scientific Instrumentation Co., Limited | Private company limited by shares | Live |
| RENMIN ELECTRICAL INSTRUMENTATION (HK) LIMITED | Private company limited by shares | Live |
| Dek Research Instrumentation Limited | | Live |
| SHANGHAI AUTOMATION INSTRUMENTATION CO., LIMITED | Private company limited by shares | Live |
| HUALI INSTRUMENTATION (SHANGHAI) CO., LIMITED | Private company limited by shares | Dissolved |
| SHANGHAI HUAXIN INSTRUMENTATION LIMITED | Private company limited by shares | Live |
| SHANGHAI PEOPLE INSTRUMENTATION SHARE LIMITED | Private company limited by shares | Live |
| SHANGHAI PEOPLE TECHNOLOGY INSTRUMENTATION LIMITED | Private company limited by shares | Dissolved |
| INSTRUMENTATION TECHNOLOGIES LIMITED | Private company limited by shares | Dissolved |
| HKK Instrumentation Technologies Co Limited | Private company limited by shares | Live |
| MLT INSTRUMENTATION TECHNOLOGIES CO., LIMITED | Private company limited by shares | Live |
| INSTRUMENTATION & TESTING LIMITED | Private company limited by shares | Live |
| CHINESE INDUSTRIAL INSTRUMENTATION EQUIPMENT TECHNOLOGY TRAINING CENTRE CO., LIMITED | Private company limited by shares | Live |