This professional portable combustible gas leak detector with visual leakage indicator, can detect gas leakage. All you need to know the high reliability testing instrument in the use of all kinds of refrigerants, alkanes, combustible gas and fuel oil is of great value in the environment of universal instruments. Can be used to detect some hydrocarbons(ethane, natural gas, ethane, propane, propane, pentane, hexane, gas oil).Specifications:Color: Red + BlackMaterial: ABS PlasticDetection Gas: Combustible GasSensitivity: Variable, Minimum 50 PPM (methane)Alarm Mode: sound alarm and light alarm Response Time: Instantaneous Warm-Up Time: ＜ 20 Seconds Battery Type: 3 * AA 1.5V Alkaline Batteries (NOT Included)Duty Cycle: 3 YearsResponse Time: InstantaneousContinuous Operation Time: 9 hours(slightly vary with working condition)Probe Length: 35.5cm / 13.98inOperating Temperature: 0～50°, Relative Humidity 0～80%Storage Temperature: 10～60°, Relative Humidity: 0～70%Item Size: Approx. 160 * 65 * 33mm / 6.30 * 2.56 * 1.30in (L * W * H)Item Weight: Approx. 175g / 6.17ozPackage Size: Approx. 23.5 * 14 * 4cm / 9.25 * 5.51 * 1.57in (L * W * H)Package Weight: Approx. 214g / 7.56ozPackage List:1 * Combustible Gas Detector1 * User Manuall