This product is a combustible gas detector for fast and reliable detection of combustible gas on gas pipelines. It is widely used and is an indispensable tool for every professional. Features: 1. Pen-type Gas Leak Detector: Detect the presence of all kinds of combustible gas and react very quickly. Compact and lightweight, easy to carry. 2. Sensitivity Selection: High and low sensitivity are switchable for different scenarios. 3. Auto Power Off: No operation, no alarm signal, automatic shutdown after about 5 minutes. 4. Audible and Visual Alarm: Send out an audible and visual alarm if combustible gas is detected. 5. Easy to Read: LCD display with green backlight ensures clear visibility even in the dim light. Note: 1.?Turn on the instrument in a clean air environment and wait for the warm-up to complete. 2. Always check the function of the gas detector before using it to ensure that it is normal. 3.?Ensure that the gas concentration does not exceed 20percent LFL ( Lower flammability limit ). 4. Due to manual measurement, the size may be slightly different. Thank you for your understanding. 5. Due to different light conditions and different monitors, item color displayed in photos may be showing slightly different from real object. Specifications: Brand: HABOTEST Model: HT60 Shell?Material: ABS Display: LCD Color: Black & Red Sensor: Gas-sensitive semi-conductor Detection Range: 50~1000ppm (methane) Response Sensitivity: less than 50ppm (methane) Test Gas (partial 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 sec Reactions Time:? less than 500PPM: Approx. 5sec more than 500PPM: Approx. 2sec Alarm Mode: visible and audible Operating Conditions: 0~50 degrees C / 20~80percent RH Storage Conditions: -10~60 degrees C / 20~80percent RH Batteries: 2 x 1.5V AAA alkaline battery ( not included ) Item Size: 17*2.8*2.3cm / 6.69*1.10*0.91in Net Weight: 35g / 1.23oz Packing Size: 17.5*4.5*3cm / 6.89*1.77*1.18in Packing Weight: 55g / 1.94oz Package List: 1 * Combustible Gas Detector 1 * Manual ( English )