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Home / Articles and Press Releases / Press Release / What is a Flue Gas Dew Point and How Does It Affect Sensor Choice?

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Press Release

What is a Flue Gas Dew Point and How Does It Affect Sensor Choice?

By Codel International

| Read Bio

Published: February 25th, 2020

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There are a number of factors that need to be considered, for example, gas temperature, flue gas dew point, dust load, stack gas pressure, water vapor concentration, location, and hazardous area classification in order to establish whether an instrument is applicable or not.

The flue gas dew point is a critical parameter for in-situ optical dust sensors like transmissometers and scatter light type. Such devices are not able to differentiate between water droplets or acid mist from the dust particles; and so, they are unable to give a representative dust reading. Therefore, alternative methods should be considered for dust concentration measurement under condensing gas conditions.

Most of the in-situ gas analysers are also not suitable for condensing gas application due to the highly corrosive atmosphere that will attack probes and optical elements of the sensor.

However, hot extractive gas analysers, like CODEL’s GCEM40E offer an optimal system for a wet gas application, assuring reliable operation and representative measurement with minimal maintenance requirements.

The high dew points of different chemical compounds (complex hydrocarbons, salts etc) that can be present in the flue gas require specialised sample probes, with forced condensation, or selection of a system that is able to maintain sampled gas temp at above the all dew points.

All of the above factors should be considered when selecting the optimal solution for your application.

Click here for more information.

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ABOUT THE AUTHOR

Codel International

CODEL International Ltd design and manufacture cutting edge instrumentation, primarily CEMS (Continuous Emissions Monitoring Systems) for industrial emissions and air pollution monitoring, road tunnel environments, plant and rail safety. Our aim is to design advanced, well-engineered equipment that provides reliable operation coupled with a low costs of ownership.

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