Multi gas detector up to 4 gases: O2 (Oxygen), LEL (flammable gases), CO (Carbon Monoxide) and H2S (Hydrogen Sulfide). Rugged and reliable. The graphic LCD displays easy to identify icons that indicate operational information. Built-in concussion-proof boot. One-button operation and straightforward user interface minimizes training. Enhanced resistance to common industrial cross sensitive gases such as methanol and ethanol (CO and H2S sensors).