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“Chang Ai”was established since 2004,we are a high-tech corporation that is specialized in studying, developing, producing and selling world leading level's gas sensors, analyzers & systems in China. ,is the analyzer manufacturer which take the science and technology personnel as the main body

Our company have multiple of invention patentS ,hundreds of utility model and design patent. we had deal with various China and Shanghai major project like: National Innovation Fund,intensified new product project,Torch Program, achievement transformation etc. Changai had become the drafting company of the《electrochemical method of trace oxygen measuring in the gases》national standard, which had establised the position of leadership of Changai company.

Chang Ai focus on the reseach and develop of various analysis and testing technology, Have 8 series and more than 100 different models:Oxygen analyzer series、Moisture(Dew point)series、Termal conductivity analyzer series、Infrared gas analyzer series、Laser(DLAS)analyzer series、High temperature humidity analyzer、Liquid phase analyzer series and all kinds continuous analyzing systems. Our products are widely used at environmental, metallurgical, petrochemical, chemical, energy, food, agriculture, transportation, water, construction, pharmaceutical, brewing, aviation and scientific research and other industries, and export to more than twenty company like Germany, United States, Britain, South Korea, India, Russia etc.