... 5%LEL 3.Resume density:8% LEL GA-338 Gas Detector 1. Voltage:AC220V or DC12V2. Sound pressure range:≥ ... power:≤5W4. Resume density:8% LEL5. Induced gas: coal gas, natural gas, LPG6. Alarm mode: flash & sound alarm,automatically ... shut-off gas valve, network alarm signal output7. Alarm density Error: ... Time Attendance and Biometrics, etc. GA-338 Gas Detector