We (ISO9001-2000 certified) are a professional manufacturer in R&D and mass-production of gas sensors and gas detectors with a history of 23 years in China. We have four main products series, Household Gas Alarm , Portable Gas Detector, Industrial Gas Detection System, Breath Alcohol Tester. Most of our products have CE , TUV , ATEX and other international approvals, and export worldwide.Good quality, Promising delivery, Satisfied service are all our tenet. We also supply you with technical supports and solutions, hopefully we could cooperate with you in the above field very soon. OEM and ODM are welcome.(For more information please visit our website: xxxxx/ )