Hanwei Electronics Group Corporation(original title:Henan Hanwei Electronics Co.,Ltd),Stock no.:300007,founded in 1998,with more than 1000 employees,is a trustworthy innovative technology company, and the largest gas sensors and instruments manufacturer in China, listed on China’s Growth Enterprise Board in the first companies, works to promise a safe, environmental friendly, healthy and smart working and living environment. Hanwei owns independent intellectual property rights and the core technology of sensors. As an industry leader, Hanwei manufactured hundreds of gas sensors, is only one of national enterprise which be able to produce catalytic, semiconductor, electrochemical, infrared(include laser) at the same time in china. Based on technical advantage of gas sensors and cross application of other sensors, Hanwei Electronics is also developing and manufacturing many kinds of sensors, such as optical sensors, mechanical sensors and thermal sensors.