The FluegasExact 2700 analyzer for effective combustion analysis

Calorimetry - For sensitive, accurate measurements of combustibles

Calorimetry technology – also known as Thick Film Catalytic sensing – is used in our SERVOTOUGH FluegasExact 2700 combustion analyzer. It works alongside the FluegasExact 2700’s Zirconia sensor to deliver a measurement of both oxygen and combustibles from one analyzer.

The sensor measures combustibles COe from its exothermic reaction with oxygen O2 over a catalytic platinum surface, which produces carbon dioxide CO2 and the heat generated is used to determine the COe concentration.
A four-quadrant bridge track is over-glazed to shield the circuit from the sample gas and two quadrants are then coated in platinum catalyst. These quadrants form a Wheatstone bridge circuit, with the disc mounted in a cell heated to 300oC (572oF) or 400oC (752oF).
When the gas sample is added, any COe present in the sample will combust on the catalyst, which will heat the respective quadrant and alter the Wheatstone bridge output voltage.
The output delivered will be directly proportional to the COe concentration, providing an accurate measurement.

Related and alternative technologies

The Calorimetry sensor works alongside Zirconia oxygen sensing for an all-in-one combustion control solution. High levels of sulfur emissions may degrade the sensor catalyst, so a sulfur-resistant sensor may be required. It also has potential cross-sensitivity to other combustible gases. Tunable Diode Laser technology, configured to measure CO, provides an alternative in some applications.

Key applications

Process heaters
Thermal crackers
Incinerators
Utility boilers

Key benefits

Highly sensitive

Accurate and stable at low concentrations

Reduced ongoing maintenance

Ideal for:

Highly sensitive, accurate and stable measurements of COe at low concentrations in combustion applications.

Explore the Calorimetry analyzers we have for your process

Servomex analyzer finder

Refine by search term

Refine selection by:

FluegasExact 2700

SERVOTOUGH Hazardous Area

Designed to measure O2 and COe in flue gases for improved combustion efficiency and reduced emissions.

The FluegasExact 2700 analyzer for effective combustion analysis
Find out more

Learn more about this technology and all the others we provide – download the magazine

Get a free copy of our special Expert Solutions magazine focusing on our complete range of sensing technologies. It’s available to download now.


Need more advice? Contact the gas analysis experts today

If you still need guidance to find the best solution for your process, we’re here to help. Our expert team combines applications knowledge with extensive experience and deep understanding of the sensing technologies available. We’ll help you find the solution that meets your unique needs.


© Copyright 2022 - Servomex is a Spectris company.
Click here to download your selected documents