HENAN HANWEI ELECTRONICS CO., LTD.The leading professional company specialized in the field of gas detection in China. The only one public listed company (Stock No.300007) in the field of gas detection in China.We specialized in gas detector, gas alarm for home use, CO alarm, alcohol tester/breathalyzer. Hanwei Electronics has established the whole IOT industrial chain with the sensor as the core, covered intelligent instruments, cloud technology software. Hanwei Electronics have many categories of sensors, gas, pressure,flow, humidity, pyroelectricity and instrument industry.We have many series products used in home,commercial,personal safety, industry online monitoring, environmental analysis,mining safety, monitoring network, safety production , municipal informatization management system, intelligent transportation monitoring system . We have rich production line, orbicular industry chain, apply to more than 100 countries all over the world.