Sensor Requirements for Combustion Control

Most commercial flue gas analyzers use electrochemical cells and optical spectrometry. Because of the high temperature and dusty and harsh environment these 

The most direct way to measure the combustion quality is to measure the oxygen concentration in the flue gas. Nowadays most oxygen sensors for use in com- 

Company Name Sensor type Measurement range Power consumption Temperature range 

Optical NDIR-methods are not suitable to detect oxygen due to the lack of a dipole moment. Tab. 5.3 gives an overview of commercial oxygen sensors. 

Another possibility to analyze the combustion quality is to measure components in the flue gas which are directly related to the 02-content like CO or C02. There are two main methods of measuring C02. One detection method uses electrochemical cells (see chapter 5.3.2.3), but both liquid and solid-state electrochemical C02-cells are not long-term stable if directly exposed to flue gas. A more promising approach is the measurement of the CO content by using modified high-temperature stable 

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