4 in 1 Gas Detector O2 H2S CO Combustible Carbon Monoxide Oxygen Flammable Gas Analyzer Toxic Gas Harmful Gas Leak Detector Features: Detect 4 kinds of gas: carbon monoxide(CO), hydrogen sulfide(H2S), oxygen(O) and combustible gas(LEL). Continuously monitor the CO, H2S, Oand LEL gas concentration in the surrounding environment with professional and accurate measurement. Sound & light vibration alarm works when one of the CO, H2S, O& LEL gas concentration reaches the level of the alarm. Can set automatic shutdown time and concentration of alarm value. Large color LCD display with backlight for easy reading. Can connect to a sampling pump to operate in closed place. Can be widely used in shipping, mining, oil exploitation, chemical, gas pipeline, tunnel construction, coal, metallurgy, paper, fire, municipal, textile and other industries. Specifications: Material: ABS Plastic Display: Color LCD Backlight Display Screen Size: 47 * 38mm / 1.9 * 1.5in Sensor: Electrochemical Principle Duty Cycle: 2 Years Explosion Proof: Protection Grade: IP65 Detection Gas: Carbon Monoxide(CO, Hydrogen Sulfide(H2S), Oxygen(O), Combustible Gas(LEL) Measurement Range: CO: 0~999ppm, H2S: 0~500ppm, O: 0~30%VOL, LEL: 0~100%LEL Resolution: CO: 1ppm, HS: 1ppm, O: 0.1%VOL, LEL: 1%LEL Accuracy: CO: 10%, HS:5%, O: 3%FS, LEL: 5%FS Alarm: Sound & Light Vibration Alarm (Alarm value can be set) Alarm Point: Low Alarm Point CO: 35ppm, H2S: 10ppm, O: 19.5%VOL, LEL: 10%LEL High Alarm Point CO: 70ppm, H2S: 20ppm, O: 22.5%VOL, LEL: 20%LEL Alarm Sound: up to 80dB Response Time: Instantaneous Warm-Up Time: < 20 Seconds Continuous Operation Time: 6 hours(slightly vary with working condition) Power Supply: 1 * Rechargeable BL-9C Lithium-ion 3.7V 2500mAh Battery (Built-in) Operating Temperature: -10~50 / 14~122 Operation Humidity: 15%~95%RH (non condensation) Product Size: Approx. 140 * 75 * 43mm / 5.5 * 3.0 * 1.7in Product Weight: Approx. 249g / 8.8oz Package List: 1 * 4 in 1 Gas Detector 1 * USB Line 1 * Storage Box 1 * Use Manual (English)