Blowing in the wind: Atmospheric pollutant monitoring

Describes the various systems which have been developed for monitoring gaseous emissions from industrial chimney stacks and flues. Compares extractive and non‐extractive systems and outlines the four main types of analyzer used in continuous extractive systems. Gives a detailed description of the cross‐stack method and how it is used to determine carbon monoxide concentration in a typical process gas flue. Concludes that cross stack analyzers can be used to measure a variety of gases and that the adaptability and low maintenance requirements of this technology make it suitable for monitoring a comprehensive range of gaseous pollutants.