The GEM™2000 and GEM™2000 Plus, designed by LANDTEC, are specifically for use on landfills to monitor landfill gas (LFG) extraction systems, flares and migration control systems. Both instruments sample and analyze the Methane, Carbon Dioxide and Oxygen content of LFG. The GEM™2000 Plus also samples and analyzes Carbon Monoxide and Hydrogen Sulfide. The GEM instruments are not total hydrocarbon analyzers. The readings are displayed and can be stored in the instrument or downloaded to a personal computer for reporting, analyzing and archiving.