Henan Relations Co., Ltd. was established in 1997, located in the National High-tech Industrial Development Zone of Zhengzhou city, Henan province. It is a high-tech enterprise integrating scientific research, production and sales. There are more than 500 employees, including more than 100 r & D technicians. Committed to the research and development, production, sales and service of gas sensors and instruments in one, forming sensors, instruments, intelligent equipment, Internet of things and other four product systems. Among them, the sensor is mainly gas concentration sensor, gas purity sensor, humidity sensor, including four series: optical sensor, thermal conductivity sensor, MEMES sensor and fuel cell sensor. The company has successively passed the ISO9001, quality, environment, occupational health and safety management system certification, as well as the information industry integration management system and other four management system certification. It has been approved to set up two provincial technology RESEARCH and development centers and one provincial enterprise technology center, academician workstation and postdoctoral RESEARCH and development base, and formed an innovation platform combining industry, university and research. - More than 400 patents and 80 software Copyrights have been authorized - Have more than 20 scientific and technological achievements with leading international/domestic technology level - Participated in the formulation of more than 20 national, electric power industry and local standards