Product description: Our product has widely used in detecting toxic and harmful gas or oxygen content detection in metallurgy, chemical industry, petroleum, pharmaceutical, environmental industries and other work environment with imported sensors, high precision and strong anti-interference ability, long service life. Lcd display, intelligent sound and light alarm design, simple operation, easy calibration, zero and alarm settings, can be output relay control signals. Metal shell, solid and durable, easy to install. Basic parameters: Size335 mm * 203 mm * 92.4 mm Weight: 3800 g Sensor types: electrochemistry method (gas catalytic combustion type, special separately) Working pattern: continuous work, can be set high or low point alarming Analog interface:4-20 ma output (optional) Digital interface:rs485 bus interface (optional) Backup power supply: Provide power more than 12 hours of battery life (optional) Provide the battery status indicator Display mode: 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: two way alarm control relay output Additional features: time, calendar display Working voltage: ac220v 50 hz Temperature range: - 20 ~ 50 Humidity: 15% ~ 90% rh (no condensation) Installation method: wall-mounted installation