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). Features: Portable detector for detecting all combustible gas. Long flexible stainless probe reaches all areas. Audible semiconductor probe and auto fast warm-up. Instant response, pinpoint leak position and low battery indication. Audio & visible leakage alarm indication and adjustable sensitivity. Compact size, light weight, easy to carry and operate. Specifications: Brand Name: SMART SENSOR Color: Red + Black Material: ABS Plastic Detection Gas: Combustible Gas Sensitivity: 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 Years Response Time: Instantaneous Continuous Operation Time: 9 hours(slightly vary with working condition) Probe Length: 35.5cm / 13.98in Operating Temperature: 050, Relative Humidity 080% Storage Temperature: 1060, Relative Humidity: 070% Item Size: Approx. 160 * 65 * 33mm / 6.30 * 2.56 * 1.30in (L * W * H) Item Weight: Approx. 175g / 6.17oz Package Size: Approx. 23.5 * 14 * 4cm / 9.25 * 5.51 * 1.57in (L * W * H) Package Weight: Approx. 214g / 7.56oz Package List: 1 * Combustible Gas Detector 1 * User Manuall