This meter is a combustible gases leakage detector, which is used to detect the leakage of combustible gases quickly and reliably. Convenient for users to safely detect and test a variety of combustible gases types, easy to meet different test needs. Two specifications are available, you can choose between CGD01B or CGD02B depending on your needs. Widely used, extensive application scenarios meet the detection needs, suitable for water heating device detection, gases pipeline detection, kitchen gases detection, restaurants and hotels, chemical plants, gases tankers, etc. Features: Portable gases detector, compact body, quick response, easy to detect leaks quickly. The housing is made of high strength ABS-engineered plastics, which is dust-proof and fall-proof， and has a long service lifespan. Using interference resistance sensors is highly sensitive and high-precise, and can provide a more accurate measurement. Convenient for users to safely detect and test a variety of combustible gases types, easy to meet different test needs. Measurable gases types (partial list): methane, ethanol, gasoline, propane, benzene, oxirane, n-hexane, butane, ethylene, carbon monoxide, acetone, ethane, etc. The extended flexible probe with flexible adjustment of the arcs, is suitable for a variety of special and complex scenarios. Triple alarm design (sound/backlight/screen display), when the detection value of gases leakage is above the threshold, the instrument will promote buzzer sound, the backlight will be red, and the screen display "HIGH" alarm. ​With the concentration unit switching function, a button switches the measurement unit between PPM and %LEL.​ Widely used, extensive application scenarios meet the detection needs, suitable for water heating device detection, gases pipeline detection, kitchen gases detection, restaurants and hotels, chemical plants, gases tankers, etc. Two specifications are available, you can choose between CGD01B or CGD02B depending on your needs. CGD01B: Analogs circle, 50-10000PPM measurement ranges, powered by 3 * AAA battery(not included), 5 minutes automatic shutdown. CGD02B: Digital concentration display and analogs bar, 50-50000PPM/0-100%LEL measurement ranges, powered by built-in 18650 battery(included), 10 minutes automatic shutdown. Specifications: Name: Combustible Gases Detector Material: plastics Model: CGD01B, CGD02B (optional) Sampling method: Diffuse Response speed: Starting in 2 seconds Calibration mode: 30 seconds automatic calibration Alarm mode: sound, backlight, screen display Test Gases (partial list): methane, ethanol, gasoline, propane, benzene, oxirane, n-hexane, butane, ethylene, carbon monoxide, acetone, ethane, etc. Preheat time: 30 seconds Operating temperature: 0-50°C Working humidity: 0-70%RH Storage environment: -10~50°C (5%-95%RH) CGD01B: Battery: 3 * AAA Alkaline Battery (not included) Display: analogs circle Test ranges: 50-10000PPM Auto power off: 5 minutes Working current: 120mAh CGD02B: Battery: 1 * 3.7V, 2000mAh 18650 lithium battery (included) Display: digital LCD concentration display and analogs bar Test ranges: 50-50000PPM/0-100.0%LEL Test flowrate: 1L/min Gases resolution ratio: 1%LEL/1PPM Charging interface: USB Type-C USB charging: 5V, 1A Measurement resolution: ＜±5%LEL, ＜±500PPM Auto power off: 10 minutes Working current: 185mAh Hose length: 285mm / 11.22in Item size: 165 * 53 * 34mm / 6.50 * 2.09 * 1.34in Package size: 190 * 65 * 45mm / 7.48 * 2.56 * 1.77in Package weight: CGD01B: 220g / 7.76ounce CGD02B: 250g / 8.82ounce Packing List: 1 * Combustible Gases Detector 1 * Guideline