... Mine Underground Coal Mine, Pipeline, and Explosive Portable Multi-Gas Detector for CO, H2S, O2 and LELFEATURES* Color LCD Display ... Use* Strong, Durable Rubber Casing Provides Anti-SlipHandleability* Detects CO, H2S, O2 and Combustible Gas* Rechargeable* Applying for ... 20 and 50% LEL *Method of Detection: Diffusion*Sensors: CO, H2S and O2 – Electrochemical Combustible Gases - Catalytic*Display: Color ...