Remote Sensing– FTIR / UV (Cerex ) UV Sentry Compounds Commonly Measured : 1,3 Butadiene Chlorine dioxide Nitric oxid Sulfur trioxide Acetaldehyde Ethyl benzene Nitrogen dio Styrene Acrolein Formaldehyde Oxygen Toluene Ammonia Hydrogen Sulfide Trimethylbenzene Benzene Isoprene Pheno Carbon disulfide Mercury Styrene Chl UVHound Instant Multi-Gas Analyzer Air Monitoring System FTIR