Basic parameters: Size:324 mm * 154 mm * 82 mm Weight: 2100 g Sensor types: electrochemistry method (gas catalytic combustion type, special separately) Destination gas: oxygen (o2), gas (ex), Toxic or harmful gases (co, h2s, nh3, cl2, etc.) Response time:30s(o2);40s(co);20 sex Display: high brightness red digital tube Alarm: more than 90 db alarm way Voice alarm (10 cm away from the detector measurement data) Light alarm for the led warning light Output control: relay output (ac220v5a), signal control (switch) (optional: 4-20 ma current signal output) Working pattern: continuous wor k Working voltage: ac220v 50 hz Temperature range: - 20 ~ 50 Humidity: 15% ~ 90% rh (no condensation) Installation method: wall-mounted installation