Ji?nan Changqing Computer Application Co., Ltd. , a private High-Tech enterprise founded in 1992, locating in Ji?nan Economy Development Zone, Shandong, China, specializes in designing, developing, manufacturing, selling and severing for the combustible & toxic gas detection instruments and gas detection system.
?As one of the High-Tech Corporations that issued by the Shandong Province Science and Technology Commission,weown more than 40 sales branches all around China, and have been developed to be the leading manufacturer in the gas monitors market of China.

??We have more than 100 kinds of products includingcombustible & toxic gas detector,explosion-proof electromagnetism valve, insulated flange, insulated joint?self contained breathing apparatus, etc. We obtained all the needed certificates such as the ISO9001 Certificate, the Certificate For Product Type Approval of the China Fire Electronic Equipment Inspection Center, the Certificate of the China National Fire Electronic Equipment Quality Supervision Center and the Certificate of the China National Quality Supervision And Test Centre For Explosion Protected Electrical Products, etc.

??With ten years hard effort, we have built a solid reputation as an experienced and trusted partner in petroleum chemical industry, combustible gas transportation, fire-proof, metallurgy, electric power, pharmacy, mining, etc. As a result, our company has been certified asone of the top supplier to SINOPEC and CNPC.

??Development is the absolute principle. We will endeavor to design, develop and manufacture high quality products to provide a safe environment for civil life and industry development in all-round way.