1、The detector uses the most advanced semiconductor gas sensor, safe and reliable, and has a long service life. 2、Built-in high reliability sensor, high sensitivity, can sense gas, natural gas, liquefied gas. 3、The gas alarm can be used to detect gas, when the gas concentration exceeds a certain level, it will immediately send an alarm signal. 4、Made with high-quality ABS and electronic components, has good durability and stability. 5、Support automatic fault detection and display, automatic reset, suitable for home use. 1 x Gas Alarm Sensor1 x Screw1 x Nut1 x Wall-Hanging Plate Condition: 100% Brand NewItem Type: Gas Alarm SensorMaterial: ABS, Electronic ComponentsWorking Voltage: 90-240VAlarm Current: 100mAQuiescent Current: 0.5uADetection Angle: 120 DegreesDetection Distance: 20m / 65.6ftWorking Environment:Temperature: -10-50 ℃Relative Temperature: <95%Alarm Volume:> 70dBSensor Life:> 5 Years (In Clean Air)Alarm Concentration:Gas: 0.1- 0.3%Natural Gas: 0.1- 0.5%Liquefied Petroleum Gas: 0.1- 0.3%Application: Gas, natural gas, liquefied petroleum gas leakage alarmWeight: Approx. 176g / 6.2ozProduct Size: Approx. 7x4x 11.5cm / 2.8x 1.6x 4.5in Alert Handling:When the concentration value of combustible gas in the ambient air reaches or exceeds the alarm setting concentration value, the detector will automatically enter a continuous alarm state, then: 1. Close the pipeline valve immediately. 2. Open the window immediately to circulate the indoor air.Avoid using all items that can generate sparks (such as lighters, matches, etc.). 4. Avoid switching on and off electrical appliances. 5. Check the cause of gas leakage, and promptly notify relevant departments and relevant professionals to deal with it. After inspection, if the detector is a false alarm, the user should check whether the installation position of the detector is appropriate.