Our company Xi'an RuihengTechnology Co., Ltd. was founded in 2005 and is located in Hi-tech Development Zone of Xi'an. We are a state-level high-tech enterprise specializing in gas analytical instruments R & D, production, sales, technical support and service. Now our mature products produced are: Series oxygen analyzer (electrochemistry, magnetic oxygen, ion flow), moisture analyzer , hydrogen analyzer (constant-potential electrolysis, laser microscopic carving, micro-flow thermal conductivity type), infrared gas analyzer (CO、CO2、NH3、SO2etc), toxic and hazardous gas detection alarm and series of high-purity gas chromatograph etc.