Portable Gas Detector, Combustible Gas Alarm, Breath Alcohol Tester manufacturer / supplier in China, offering Portable Single Gas Detector with Smart Sensor Module (E1000), IP66 Portable Single Gas Detector for Co/H2s/No/No2/So2 Toxic Gas (E1000), Portable Sulfur Dioxide So2 Gas Detector IP66 Single Gas Monitor (E1000) and so on.