The Metravi GD-09-4M (2025 Model) Four-in-One Multi Gas Detector can easily, continuously and simultaneously detect Explosive Gas (EX), Oxygen (O2), Carbon Monoxide (CO) and Hydrogen Sulphide (H2S). The Metravi GD-09-4M Four-in-One Multi Gas Detector is widely used in areas where explosion-proofing is required or toxic gas leaks might occur, like underground channels, in the mining industry and warehouses. It can also be used in living environments like homes, offices, restaurants, hotels, etc. It is a useful tool which helps protect lives and avoid damage to relevant equipment. Features: Natural diffusion sampling method and high-sensitivity sensor, with high sensitivity & repeatability. 32-bit built-in MCU, high reliability and self-adaptation ability. Full functions with easy operation. Large Colour LCD, more intuitionist, with abundant and clear readings. Compact design for easy carrying. High strength engineering plastics and compound, anti-slippery rubber; high strength, water-proof, dust-proof and explosion-proof. Data Logging up to 500 groups.