Wintact WT8820 Handheld Combustible Gas Detector Leakage Natural Gas Sensor Gas Leak Test Instrument 12-inch Gooseneck Sensor One hand operated tester for detecting the leaked gas indoors with its slim goose neck sensor, and alarm if gas leaks. It is widely used in environmental monitoring, petrochemical industry, sewage treatment, agricultural research, medical, etc. Specifications: Material: ABS Sensitivity: 50ppm methane Sensor Type: Low power semiconductor Warm-up Time: 60 seconds (25℃, 60%RH environment) Response Time: 2 seconds Operation Cycle: Continual operation Alarm Limit: Lel 10% of methane Low Battery Indication: 3±0.2V Operating Environment: 0~50℃(32~120℉), 10~90%RH(non-condensing) Working Current: About 150mA Power Supply: 3 * 1.5V AAA battery (NOT included) Flexible Tube Length: 318mm / 12.52in Item Size: 132 * 68 * 27mm / 5.20 * 2.68 * 1.06in   Item Weight: 166g / 5.88oz Package Weight: 224g / 7.93oz Package Size: 24 * 15 * 5cm / 9.45 * 5.91 * 1.97in