This product is a combustible gas leak detector, used for fast and reliable detection of combustible gas leakage on the gas pipeline. It is widely used and is an indispensable tool for every professional. Features: 1. Gas Leak Detector: The gas leak detector with LCD display can detect the presence of many kinds of combustible gas and react very quickly. Compact and lightweight, easy to carry. 2. Ambient Humidity and Temperature: In addition to detect the combustible gas, the use of high-precision temperature and humidity sensors, used to measure the current environment relative humidity and temperature. 3. Audible and Visual Alarm: When the detector detects combustible gas, the number of analog strips will increase as the gas concentration increases; the buzz will increase as the gas concentration increases, and the backlight will change from green to orange and up to red as the signal increases. 4. Auto Power Off: When no operation within 10 minutes, no detection signal, the instrument will automatically shut down. 5. Sensitivity Selection: High / Mid / Low sensitivity are switchable for different scenarios. Note: 1. Must be in a clean air environment power on, and wait for the completion of preheating. 2. Due to different light conditions and different monitors, item color displayed in photos may be showing slightly different from real object. 3. Due to manual measurement, the size may be slightly different. Thank you for your understanding. Specifications: Display: LCD Color: Black & Red Shell Material: ABS Sensor: Gas-sensitive semi-conductor Response Range: 50PPM~1000PPM (Methane) Sensitivity: more than 50PPM (Methane) Test Gas (part list): acetone, acetylene, alcohol, ammonia, benzene, butane, ethanol, oxirane, gasoline, hexane, hydrogen, methane, naphtha, natural gas, paint thinners, propane, solvents, etc. Warm-up Time: Approx. 30 seconds Response Time: less than 500PPM: Approx. 5sec more than 500PPM: Approx. 2sec Alarm Mode: Buzzer and indicator light Sensitivity Selection: High / Mid / Low sensitivity Ambient Temperature Testing: Range: -20.0 degrees C ~ 60.0 degrees C ( -4.0 degrees F ~ 140.0 degrees F ) Precision: 0.0 degrees C ~ 45.0 degrees C ( 32 degrees F ~ 113 degrees F ) ±1.0 degrees C / 2.0 degrees F Other: ±1.5 degrees C / 3.0 degrees F Resolution: 0.1 / 1 Ambient Humidity Test: Range: 0.0percent ~ 99.9percent RH Precision: 20percent ~ 80percent , ±5.0RH Other: ±6.0RH Temperature Units: degrees C / degrees F Operating Conditions: 0 ~ 50 degrees C / 20 ~ 80percent RH Storage Conditions: -10 ~ 60 degrees C / 20 ~ 80percent RH Batteries: 3 x 1.5V AAA Alkaline battery ( not included ) Item Size: 14.2*5.8*2.6cm / 5.59*2.28*1.02in Net Weight: 115g / 4.06oz Packing Size: 18.5*9*5.5cm / 7.28*3.54*2.17in Packing Weight: 193g / 6.81oz Package List: 1 * Gas Leak Detector 1 * Cloth Bag? 1 * Manual ( English )