Which component of CEMS is responsible for preparation of the gas sample before analysis?

The sampling system is the component of Continuous Emissions Monitoring Systems (CEMS) that is specifically designed to prepare the gas sample before it undergoes analysis. This system plays a critical role in ensuring that the sample is representative and suitable for accurate measurements. It typically involves processes such as cooling, filtering, and transporting the gas sample from the source to the analyzer.

By ensuring that particulate matter and other contaminants are removed, the sampling system prevents interference that could skew the analytical results. Proper sample conditioning is essential because it helps maintain the integrity of the gas sample, allowing for precise and reliable detection of the various components in the emissions being monitored.

In contrast, gas analyzers perform the actual measurement of the gas concentrations but rely on correctly conditioned samples provided by the sampling system. The data acquisition system manages the collection of measurement data from the analyzers, and the controller unit oversees the overall operation of the CEMS, but neither of these components is directly involved in the preparation of the gas sample itself.