Dimensions 69x120mm Note: Since this 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 emit a slow, accelerated or sustained 85 dB continuous audible alarm. It cannot detect toxic gases such as carbon monoxide. LED digital display and sound warning - The gas detector indicator shows 0 under normal conditions. If a flammable gas leak is detected, the numbers 1-9 and A may appear on the display. Once the concentration exceeds 3% of the LEL, the alarm sounds and flashes red. According to the concentration of combustible gas, the alarm will be in different alarm states. DURABLE AND ENERGY SAVING - Standard European plug and play plug 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 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 to the air inlet of the methane detector, then deflate slowly (does not light up during deflation). When the concentration reaches the standard, the alarm will sound until the gas volume in the environment falls below the alarm point. To note: The system warm-up time is approximately 2-3 minutes. During this time, the gas test will not work.