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This post was last edited by yunrun on 2019-7-31 at 19:21. The authorized legal metrology calibration institutions can be found at yunrun.com.cn/tech/2650.html. Changhui Instrument Manufacturing Co., Ltd. specializes in the production of temperature standard devices: standard thermocouples and standard platinum resistance thermometers. When purchasing these products, users request that a calibration certificate issued by an **authorized legal metrology calibration institution at the provincial level or above** be provided. This article shares a list of such authorized institutions (39 in total) to facilitate their use. A legal metrological verification institution is a metrological technical organization established by the metrological administrative department in accordance with the law or authorized to do so. It plays a role in ensuring the unity of China’s metrological system as well as the accuracy and reliability of measurement values, and it provides technical support for the metrological administrative department to carry out metrological supervision in accordance with the law. There are two types of statutory metrology institutions in our country: one is the **statutory metrology verification institutions**, which are established by the metrology administrative departments of people’s governments at or above the county level in accordance with the law ； Secondly, as needed, the people’s **metrology administrative departments at or above the county level authorize professional or regional metrology verification institutions to serve as statutory metrology verification institutions. **The legal metrological verification institution is the core of such institutions, and it is primarily responsible for mandatory verifications as well as other verification and testing tasks. **Grade metrology institutions include the National Institute of Metrology of China and specialized metrology stations authorized by the General Administration of Quality Supervision, Inspection and Quarantine, among other entities ； The metrological technical institutions at the provincial, municipal, and county levels include **legal metrological verification institutions established in accordance with the law, as well as metrological technical institutions authorized by law. China National Institute of Metrology, Beijing Institute of Metrology and Testing Science, Tianjin Institute of Metrology Supervision and Testing Science, Hebei Institute of Metrology Supervision and Testing, Shanxi Institute of Metrology Supervision, Verification and Testing, Inner Mongolia Autonomous Region Institute of Metrology and Testing, Liaoning Institute of Metrology Science, Jilin Institute of Metrology Science, Heilongjiang Institute of Metrology Verification and Testing, Shanghai Institute of Metrology and Testing Technology, Jiangsu Institute of Metrology Science, Zhejiang Institute of Metrology Science, Anhui Institute of Metrology Science, Jiangxi Institute of Metrology and Testing, Fujian Institute of Metrology Science and Technology, Shandong Institute of Metrology Science, Henan Institute of Metrology Science, Hubei Institute of Metrology and Testing Technology, Hunan Institute of Metrology and Testing Science, Guangdong Institute of Metrology Science, Guangxi Zhuang Autonomous Region Institute of Metrology and Testing, Hainan Institute of Metrology and Testing, China National Institute of Testing Technology, Chongqing Institute of Metrology and Quality Inspection, Guizhou Institute of Metrology and Testing, Yunnan Institute of Metrology and Testing Technology, Shaanxi Institute of Metrology Science for Verification, Gansu Institute of Metrology, Qinghai Institute of Metrology Verification and Testing, Ningxia Hui Autonomous Region Institute of Metrology and Testing, Xinjiang Uygur Autonomous Region Institute of Metrology and Testing, Tibet Autonomous Region Institute of Metrology and Testing, North China ** Metrology and Testing Center, Northeast ** Metrology and Testing Center, East China ** Metrology and Testing Center, Central South ** Metrology and Testing Center, South China ** Metrology and Testing Center, Southwest ** Metrology and Testing Center, Northwest ** Metrology and Testing Center. The above is a list of **authorized metrology verification institutions at or above the provincial level. Changhui Instruments would like to remind you that not all such institutions are capable of carrying out verification work on first-class and second-class standard thermocouples/standard platinum resistance thermometers; therefore, before sending your products for inspection, it is advisable to contact the relevant institution to confirm whether they offer such verification services, so as to avoid delays in the inspection process. Recommended reading: Pressure transmitters yunrun.com.cn/product/