Gas monitoring instruments and systems for engine emissions measurements - Air and Climate

The exhaust gas from combustion engines is a complex mixture of gases and particulate matter. The composition of the gas may change rapidly. Multicomponent analysis of exhaust gases can be performed with a Gasmet™ FTIR Gas Analyzer with a response time (T90) of one second. The winning combination is the result using of a small volume gas sample cell, a powerful sample pump and a fast detector with liquid nitrogen cooling. The analyzer, sampling system and computer can be assembled on a cart for use in a dynamometer laboratory, or the portable version can be used for roadside tests.

Typically analyzed components (up to 50 components active at a time) include:Water vapour H2O

  • Carbon monoxide CO and carbon dioxide CO2
  • Nitrogen oxides NO and NO2
  • Water-soluble gases such as sulfur dioxide SO2, hydrogen chloride HCl, and ammonia NH3
  • Isocyanic acid HNCO
  • Speciated hydrocarbons (up to C8)
  • Speciated BTEX (Benzene, Toluene, Ethylbenzene, Xylenes)
  • Other volatile organic compounds (VOC’s) such as alcohols, aldehydes, methyl tert-butyl ether (MTBE)