GEALDEN Digital Combustible Propane Methane Gas Sensor Sniffer This handheld detector is the best solution for tracking down the source of a leak before it becomes a major problem. It can detect all combustible gas leak, including Natural Gas, Propane, Methane, Butane,LNG, LPG etc. How to Detect Gas Leak in Your Home or Workplace? A highly sensitive sensor sits on top of a flexible tube that allows you to change the detection direction to hone in on the leak’s source. Sound and visual alarms will indicate the amount of gas as you walk around. Quick response. It can reactive to change of gas concentration you can pin point the source of leaks. Specifications: Sensitivity: Variable, Minimum 50PPM (methane) or 1 Percent LEL Type of sensor: Low-power semiconductors Alarm Mode: Sound alarm and light alarm Preheating time: <30 Seconds(25 Degree C, 60 Percent Rh environment) Material: ABS Plastic Detection Gas: Combustible Gas Response Time: 2~5 seconds Use cycle: Continuous work Power supply mode: AA?3 alkaline dry cells (Included) Working voltage: 4.5V Working current: 150MA Battery life: Continuous use for 4 hours(slightly vary with working condition) Probe Length: 30cm / 12in Operating Temperature: 0~50 Degree C (32~122 Degree F) Product size: 6.58*3.28*15.7cm / 2.59*1.29*6.18in Weight: 360g / 0.79lb Package List: 1 * Combustible Gas Detector 1 * User Manual 3 * AA 1.5V Batteries