gas detection meters gas detection equipment toxic gas monitor GAS DETECTION METERS The gas detection meters have three benefits: they provide air quality control, assure safety in environments where dangerous gases are present and conserve electricity, because the ventilation equipment runs only when required. Other gases include CO2 for indoor air quality, Diesel fumes detection for bus and truck terminals and unloading areas, Volatile Organic Compounds (VOC) for numerous industrial and office applications, R-123 refrigerant detection, and O2 deficiency detection.