We have researched and developed the following products: SK-1600 and SK-8000d series gas alarm controller, SK-6000 series gas detector, SK-6000JA gas detector for home use ,SK-7000 portable gas detector. All of our products are passed the examination of China National Supervision and Test Center for Fire Electronic Product Quality. All of out products are obtained the Certificate For Product Type Approval issued by China Certification Center for Fire Products, Ministry of Public Security, PRC and Certificate Of Conformity of electronic apparatus for explosive atmosphere issued by China National quality supervision and test center for explosive protected electrical products. SK-6000JA also obtained the CE certificate.