LNG Detector(I/O) Executive standard: GB 15322.2-2019 Combustible Gas Alarm Part 2: Household Combustible Gas Alarm High sensitivity detection, accurate measurement Threshold: 8% LEL (CH4); Support local sound and light alarm. Support self-test, Multing, fault, sensor failure. Supports the linkage of peripherals such as shut-off valves and exhaust fans. Supports multiple types of log saving functions. Power supply voltage: DC 12V.