“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.