Feature: 1. Eliminate Hazards: It is suitable for explosion-proof, underground pipelines, etc, to ensure the safety of personnel. 2. Gas Water Heater: Detect along the gas line when the screen is bright red and accompanied by a beep alert for the current location of the leak. 3. Gas Tank Leak: Close to the detection gas concentration exceeding the 20% LFL safe value, a red alarm accompanied by an urgent beep. 4. Gas Stove Leak: The concentration does not exceed the safety value of 20% LFL, and a bright green screen indicates safety. 5. High Precision: Detection range 300~10000PPM, H / L high and low sensitivity can be switched. Specification: Gas detector is a must-have for anyone worried about gas leaks, whether you need to analyze gas leaks, conduct environmental testing, or simply want to make sure your home is safe, this sensor tool is ideal for you. Features: Eliminate Hazards: It is suitable for explosion-proof, underground pipelines, etc, to ensure the safety of personnel. Gas Water Heater: Detect along the gas line when the screen is bright red and accompanied by a beep alert for the current location of the leak. Gas Tank Leak: Close to the detection gas concentration exceeding the 20% LFL safe value, a red alarm accompanied by an urgent beep. Gas Stove Leak: The concentration does not exceed the safety value of 20% LFL, and a bright green screen indicates safety. High Precision: Detection range 300~10000PPM, H / L high and low sensitivity can be switched. Auto Shutdown: Automatically turn off within 5 minutes when there is no measurement signal running. Specifications: Model: GN801 Material: ABS Color: Red Detection Range:300~10000PPM Sensor: Gas-sensitive semiconductor Response Time: ≤500ppm (about 5 seconds), >500ppm (about 2 seconds) Response Sensitivity: <50ppm (methane) Power Supply: 2 * AAA batteries (Not Included) Alarm Function: Beep alarm / Mute Warm-up Time: Approx. 30 seconds Auto Shutdown Mode: No operation or measurement for 5 minutes, will automatically shutdown Adjustable Sensitivity: High sensitivity / Low sensitivity Item Size: 170 * 25.5 * 32mm / 6.69 * 1.00 * 1.26in Item Weight: 90g / 3.17oz Package Weight: 104g / 3.67oz Package Size: 20 * 5.5 * 4.4cm / 7.87 * 2.16 * 1.73in Package List: 1 * Combustible Gas Detector 1 * Screwdriver 1 * Packaging Box 1 * User Manual (English) Package List: 1 * Combustible Gas Detector 1 * Screwdriver 1 * Packaging Box 1 * User Manual (English)