The measurement and monitoring of emission components in flue gases is one of the most important topics for continuous gas analysis. This is a result of legislation for monitoring emissions, e.g. for waste incinerators, and also due to the requirements of companies operating process plants who can draw conclusions on process efficiency from the gas analyses, e.g. with boiler and oven controls, DeNO_x and DeSO_x plants.

The market requires a reliable complete system which is specially designed for the application. The Gasmet CEMS (Continuous Emission Monitoring System) offered by Siemens is an extractive and continuous gas probe measuring system based on established FTIR spectroscopy method. It reliably covers all requirements associated with sampling, sample processing, and gas analysis.

The concentration of the following gas components can be determined on the basis of FTIR: CO, CO₂, HCl, HF, H₂O, NH₃, NO, NO₂, N₂O, SO₂, CH₄, C₂H₄, C₂H₆, C₃H₈, C₆H₁₄and HCOH. The FTIR measurement can also be used to derive additional values for total organic carbon and NO_x. In addition, the Gasmet CEMS offers space for an optional ZrO₂ oxygen analyzer as well as a FIDAMAT 6 for determining total organic carbon levels (also QAL1 certified, if required).

The standardized Gasmet CEMS provides great clarity and simple configuration facilities. Different versions facilitate individual adaptation to the system requirements in hand. Standardization, however, also means that not all imaginable versions can be included, and that it may not always be possible to implement particular requirements such as armored cables, customer-specific documentation or special conductor labeling without an extra charge.