It is widely used in gas transmission and distribution pipeline safety inspection, pipeline maintenance and emergency leakage in cities and towns gas, oil, petrochemical, oil depot, gas station, oil field and other departments. It could detect many kinds of gas, such as combustible flammable gas, volatile gas, oxygen, ammonia gas, formaldehyde and VOL PM2.5, hydrogen sulfide, carbon monoxide , carbon dioxide, hydrogen, halogen gas, etc., etc. The use of high quality materials, strong and durable, has a long service life. Easy to use, just press the power key for 2 seconds to turn on/off. The sensor adopts the principle of electrochemistry, it can quickly find leaks and take precautions to ensure safety. Feature: 1. It could detect many kinds of gas, such as combustible flammable gas, volatile gas, oxygen, ammonia gas, formaldehyde and VOL PM2.5, hydrogen sulfide, carbon monoxide, carbon dioxide, hydrogen, halogen gas, etc., etc. 2. It is widely used in gas transmission and distribution pipeline safety inspection, pipeline maintenance and emergency leakage in town and city gas, oil, petrochemical, oil depot, gas station, oil field and other departments. 3. The sensor adopts the principle of electrochemistry, it can quickly find leaks and take precautions to ensure safety. 4. The use of high quality materials, strong and durable, has a long service life. 5. Easy to use, just press the on-off key for 2 seconds to turn on/off. Spec: Condition: 100% New Item Type: Combustible Gas Detector Material: Plastic Color: As shown in the picture Model: 602 Sensor: Principle of electrochemistry Factory alarm point: Low alarm point 2000ppm low frequency buzzer and flashing light High frequency 4000ppm buzzer alarm point and flashing light Detection concentration: 300-10000ppm, resolution: 1ppm Temperature range: 0-50 Humidity range: 15%-90% RH (non-condensing) Battery: 3 AAA batteries (not included) The range of combustible gas detection Alarm: combustible and combustible gas, volatile gas, oxygen, ammonia, formaldehyde and VOL PM2.5, hydrogen sulfide, carbon monoxide, dio