Chengde Central Power Electronic Co., Ltd. was founded in 1998. Now it has become a national-level high-tech enterprise of instrument research and development, production, sales, and service. It covers an area of 10,000 m2, with building area of 8,000 m2. Observing ISO9001 Quality Management System and Digital China ERP Management system, CP Co. has specifically designed calibration device, including advanced large-caliber liquid MFR standard calibration device, sonic nozzle gas standard calibration device, and MFR micro-gas flow calibration device. The products are widely used in various industries, including petroleum, chemical engineering, metallurgy, electric power, light industry, architectural material, environmental protection, pharmaceutical industry, food, gas, water treatment, building automation, etc. Products are sold to over 20 cities in China and also to Vietnam, India, Pakistan, South Korea, Russia, and Tajikistan.