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An air analyzer is used to analyze the air quality in and around employee work areas. It may be used to detect things like flammable vapor conditions (lower explosive limit [LEL]), poisonous hydrogen sulfide gas (H2S), carbon monoxide (CO) and any oxygen (O2) deficiency (19.5% or below) or enrichment (23.5% or above) in the air.
Other applications for ambient air analyzers include evaluation of emissions levels for vehicles and stacks in relation to the standards set by the EPA (/sup). The EPA sets strict guidelines to ensure the air analyzers are properly calibrated and maintained.