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1. Jingyi: Established in 1983, Jingyi Group was formerly known as the Beijing Electronic Instruments Industry Bureau. It focuses on the development of automation systems and instruments, possesses a complete industrial chain for automated instruments, and has the capability to provide customers with comprehensive solutions in the field of automation as well as turnkey project services. Since its establishment 20 years ago, Jingyi Group has built long-term joint venture partnerships with various international companies such as ABB, Emerson, and Olympus. 2. Chuanyi Co., Ltd. Chuanyi Automation was established in 1965; its predecessor was Sichuan Thermal Instrument Factory. It is a comprehensive automation instrument manufacturing enterprise in China with a large scale, a wide range of products, and strong system integration capabilities. As a listed company that specializes in industrial automation instruments and control devices, it was listed on the Shanghai Stock Exchange in 2014 (stock code: 603100). Its products are primarily used in key industries of the national economy such as petroleum, power generation, metallurgy, chemicals, and building materials, as well as in emerging fields such as nuclear power, municipal environmental protection, and urban rail transit. 3. Sure Instrument – Sure Technology was established in 2006. As a rising star among instrument brands, it is a professional manufacturer of flow meters and a provider of system solutions. It offers \"one-stop\" high-quality services for instruments used to measure and control flow, temperature, pressure, level, etc., and holds a leading position in China in terms of both quality and scale. It also develops system solutions for comprehensive energy management, smart water management, smart gas management, and smart heating management for customers. 4. Shanghai Kent: Established in 1993 and located in the Tinglin Industrial Park in Jinshan District, Shanghai Kent specializes in the research, development, manufacturing, sales, and service of electromagnetic flowmeters. Thanks to its excellent quality and superior service, it has earned a good reputation among users and enjoys high recognition within the national flowmeter industry. 5. Shanghai Zhenlan Instruments: Established in 2011, Shanghai Zhenlan Instruments is primarily engaged in the research, development, manufacturing, and sales of gas and water metering instruments as well as related products. The main products include residential and industrial membrane gas meters, smart gas meters, and ultrasonic gas meters ； Various intelligent water meters and ultrasonic water meters in DN15-DN300 sizes ； Intelligent gas gear flow meters & turbine flow meters, ultrasonic flow meters, intelligent flow controllers, as well as cloud computing-based digital information integration solutions, etc. 6. Guanghua Instruments (Shanghai Guanghua Instruments Co., Ltd.) was established in 1934 and is part of the China National Nuclear Corporation. It is one of the earliest manufacturers of flow meters in China, specializing in the production of various industrial automation instruments for measuring flow, differential pressure, pressure, and level. Its products are widely used for measuring the flow of liquids, gases, or steam, as well as parameters such as differential pressure, pressure, and level; some of its products have reached the international market. 7. Kaiyi (Kaifeng Instrument Co., Ltd.) – Kaifeng Instrument was originally established as Kaifeng Instrument Factory in 1958. It is a specialized company focused on the development and production of flow meters, flow measurement devices, and level gauges. Its main products include various types of flow meters suitable for liquids, gases, and steam, as well as flow standard devices, level gauges, and industrial automation instruments. These products are exported to over 30 countries and regions, with customers spread across all five continents of the world. 8. Diyuan Instruments: Established in 1991, Diyuan Instruments is a high-tech enterprise located in Yiwu, Zhejiang Province, China. It specializes in the development, production, sales, and technical support of intelligent flow meters and smart water meters for use in fluid control and trade measurement applications. The company is renowned for its excellence in technological innovation and product quality; it boasts provincial-level high-tech R&D centers as well as expert workstations, and is committed to providing advanced flow meter solutions. 9. WELLTECH: Established in 1992, WELLTECH is a well-known domestic supplier of solutions for industrial automation control systems. It is a listed company that is primarily engaged in the research, development, production, and sales of measurement instruments for pressure, flow, temperature, as well as control devices such as control valves and electric actuators. It was listed on the Shenzhen Stock Exchange on August 2, 2006 (stock code 002058). 10. Anhui Tiankang was established in 1974. It produces five series of instrumentation products related to temperature, pressure, level, flow rate, and complete systems. The supercritical thermocouples and thermal resistors developed by the company itself have been certified by **authoritative institutions and are widely used in the nuclear power industry. Electromagnetic flowmeters LDG series – Electromagnetic flowmeters: These products are primarily used for measuring and controlling flow rates in various industrial and agricultural processes, including those in the petrochemical industry, steel metallurgy, municipal heating systems, water supply and drainage systems, irrigation projects, water treatment, sewage treatment plants (for environmental protection, chemical wastewater treatment, electroplating wastewater treatment), paper manufacturing (pulp production), mud handling, pharmaceuticals, and food processing industries. Product features: The product range in terms of diameter covers DN4 to DN2000; it features high measurement accuracy, high reliability, and high convenience. The accuracy grades available are 0.5 and 0.2. The enclosure is protected to IP68 standard, and the capacitive buttons allow operation without having to open the cover, ensuring good sealing. Additionally, a pressure sensor can be installed as an option to monitor the pressure in the pipeline network.