Shanghai Daojing Intelligent Instrument Co., Ltd. is a professional automation instrument manufacturing enterprise that integrates the research and development, production, sales, and service of flow meters, temperature/pressure instruments, liquid/level instruments, and fluid control systems. The company always puts product quality first, and has successively introduced the German Cologne 0.2 level DN10-DN800 liquid flow automatic system calibration and measurement appraisal device, the German E+H 0.5 level DN15-DN300 gas flow automatic system calibration and measurement appraisal device, and the Emerson 0.3 level DN25-DN200 gas mass flow calibration device for precise calibration of flow meters. Let every user rest assured, at ease, and worry free. Shanghai Daojing Intelligent Instrument Co., Ltd. has won market support with excellent equipment, strong strength, humanized management, and active service. Since its establishment, we have independently developed and produced more than 10 types of flow products, and successfully developed various complete sets of automation instruments and flow calibration devices. Applied in various fields such as petroleum, petrochemicals, metallurgy, pharmaceuticals, food, water conservancy engineering, sewage treatment, etc., and indirectly exported to Indonesia, South Korea, Russia and other regions, it has received unanimous praise from customers.