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Qingdao Automation Instrument Co., Ltd. is located in Qingdao, a beautiful coastal city in Shandong Province. Restructured from a state-owned enterprise founded in 1958, it is a national high-tech and specialized sophisticated enterprise integrating R&D and manufacturing, and one of the earliest manufacturers of vortex flowmeters in China. Its registered trademark is "Qingliu". It has participated in formulating 19 national and industrial standards. To guarantee product quality, the company has built complete flow standard devices for water and gas, and established a standard laboratory jointly operated with Qingdao Institute of Metrology Technology. Its products have won the National New Product Certificate and Excellent Energy-saving Product Certificate promoted by eight national ministries and commissions. The enterprise serves as vice director member of China Instrument and Control Society, director member of Shandong Metrology Testing Society and vice chairman member of Qingdao Metrology Testing Society. All technical indicators pass quality inspections steadily, ranking top in the industry. Qingliu products are widely applied in thermal power, urban heating, new energy, new materials, petroleum, chemical, food, textile, papermaking, pharmaceutical, machinery manufacturing and other industries, serving as ideal flow measuring instruments.