GfG G450 - Handheld Four-Gas Sensor The G450-11424 four sensor multi-gas detector is capable of distinguishing Carbon monoxide (CO), Hydrogen sulfide (H2S), Oxygen (O2), and Methane (CH4). It also comes with LEL detection capabilities. It's compact, durable and very easy-to-use. G450 sensors are warranted for 3 full years, ensuring that the G450 has the lowest cost-of-ownership of any confined space gas detector on the market today. Replacement sensors carry the same 3 year warranty as the original sensors. The G450 offers completely automatic calibration, one-button operation, top mounted display and interchangeable battery packs for up to 24 hours of continuous operation. The optional motorized pump operates in diffusion and sample-draw modes, and can be easily attached or removed from the instrument when sampling needs change. Features: Compact and robust 1-to-4 sensor design Full 3-year warranty on all sensors CSA and Ex certified INMETRO certified MSHA Approved version available Interchangeable battery packs for up to 24 hours continuous operation Motorized pump operable in diffusion or sample-draw mode Highly water resistant (IP 67) Affordable price! https://www.viasensor.info/products/gfg-g450-handheld-multi-gas-sensor