Hanwei Electronics is the largest sensors and gas detectors manufacturer in China, the IOT solution supplier based on sensor technology. Manufactures industrial gas detector, home gas alarm, carbon monoxide alarm, alcohol tester, which are to build a safe, environmental, healthy working and living environment. Hanwei products got CE, ATEX, EN, IMMETRO, ICEEx, SIL2, EAC, Russian GOST etc.certifications.