Dimensions 69x120mm Note: Since it is manual measurement, please allow for some errors in the data. Thank you for your understanding. Stay safe - Gas detectors are mainly used to detect natural gas (main components: methane), liquefied petroleum gas (main components: propane, butane) and city gas (alkanes, olefins, arene). When the combustible gas leak exceeds the standard, the gas detector will sound a continuous slow, accelerated or 85 dB audible alarm. It cannot detect toxic gases such as carbon monoxide. Digital LED display and audible warning - Gas detector indicator reads 0 under normal conditions. If a flammable gas leak is detected, the numbers 1-9 and A may appear on the screen. Once the concentration exceeds 3% LEL, the alarm will sound and flash red. According to the concentration of combustible gas, the alarm will be in different alarm states. DURABLE AND ENERGY SAVING - European standard plug and play socket design, no need for converters, very simple installation and practical. The detector is anti-mold, anti-insect and anti-corrosion. Flame retardant ABS plastic, easy to clean. Significant energy savings by using less than 2 watts of power. Widely used in restaurants, kitchens, hospitals, hotels, oil factories, garages, gas stations, etc. TEST METHOD - Press and hold the ignition switch located at the air inlet of the methane detector, then deflate slowly does not light up during deflation). When the concentration reaches the standard, the alarm sounds until the gas volume in the environment falls below the alarm point. To note: System warm-up time is approximately 2-3 minutes. During this time, gas test will not work.