86.O2 measurement in IG

The oxygen analyzer is designed for front panel mounting. The oxygen analyzer measures the content of oxygen with concentrations up to 21.0%.

The oxygen analyzer uses a zirconia sensor. The zirconium dioxide sensors have long been established as industry standards, but this oxygen analyzer uses a new enhanced type of zirconia sensor, which can be used in a wide range of applications.

The most important element of the sensor is the zirconia cell. At high temperatures it functions like a fuel cell i.e. the oxygen ions can pass through the zirconium dioxide membrane, and the sensor generates its own voltage. When the membrane is exposed to environments that contains different amounts of oxygen (i.e. ambient air on one side and flue gas on the other), nature seeks to balance itself, and the oxygenions will penetrate the membrane which develops an electrical charge.

This charge depends on the amount of passing oxygen ions i.e. the difference between the partial pressures of the oxygen in the flue gas versus the oxygen in the ambient air. This voltage will be detected and converted into a signal that is proportional to the oxygen concentration in the flue gas. The signal will be processed in the oxygen analyzer and the oxygen concentration of the sample gas will be shown in the display.