MSA ALTAIR® Pro Portable Oxygen Monitor PVC Dipped Property Value Product Type Multi Property Value Product Type Multi Gas Detector Gas To Be Measured %LEL (Lower Explosive Limit) Combustible Gas H2S (Hydrogen Sulfide) Hydrogen Sulfide O2 (Oxygen) Oxygen CO (Carbon Monoxide) Carbon Monoxide Drawstring Mesh Side panels Based on the industry standard ALTAIR Single Gas Detector but with added features and functionality ALTAIR Pro toxic gas and oxygen detectors combine reliable detection and LED audible flashing vibrating alarms with clear Monitor measures concentrations of carbon monoxide with the help of highly accurate electrochemical sensors