SERVOTOUGH hazardous area

The FluegasExact 2700 delivers effective combustion analysis

Designed to measure O2 and COe in flue gases for improved combustion efficiency and reduced emissions, the FluegasExact 2700 gas analyzer meets the most demanding needs of combustion efficiency applications in the power generation and process industries.

Advanced flue gas analyzer for oxygen and combustibles

Armed with an integral sampling system custom-designed for operation in some of the hottest and most extreme combustion environments, the FluegasExact 2700 measures oxygen and combustibles in the most demanding hydrocarbon processing and power generation applications.

Designed for high temperature processes up to 1750°C (3182°F), it is ideal for use in extreme heated environments. This resilience makes it the analyzer of choice for controlling a wide range of combustion processes, including use in process heaters, utility boilers, thermal crackers, incinerators and furnaces.

Keith Warren
Product Manager – Process Oxygen, Zirconia & Oxygen Deficiency

Unbeatable performance in the most challenging locations

When you work in combustion analysis applications where high temperatures and particulates/dusts are occupational hazards, you need a gas analysis solution that offers rugged durability and unrivalled performance. Using a robust, fully heated stainless steel design, the FluegasExact is certified for Zone 2/Division 2 monitoring. High temperature and flow sensor options further extend operational performance.

A no-compromise solution

At the heart of the SERVOTOUGH FluegasExact’s exceptional performance are Servomex’s patented Zirconium Oxide cell for oxygen measurement and a Thick Film catalytic sensor for measuring carbon monoxide and COe (combustibles). Combined, the performance of both technologies improves process control and helps reduce excess oxygen, reducing NOx, SO3 and CO emissions and has been proven to save up to four percent of fuel costs per year. Both sensors are installed within Servomex’s custom-designed heated sensor head, which has a low-flow extractive design that can attach directly to the flue or can be remote mounted. Manufactured to the highest quality standards, this ensures exceptional performance in the toughest environments and with the minimum of maintenance.

Unbeatable value over product life

The ability to reduce ongoing maintenance costs and minimize long-term ownership costs is essential, while operational benefits like simple installation requirements are highly attractive. Supported by Servomex’s global service network, which offers a complete package of support from commissioning to servicing, the FluegasExact delivers a long life of exceptional performance.

Let us build your gas analysis system

If you’re looking to build a gas analysis system, get in touch with the experts. Our experienced systems team provides the knowledge, engineering skills and collaborative approach to deliver the best solution for your process.

Ready to buy? Here’s how it works

It’s easy to find the product you need for your application with Servomex


Get in touch to tell us what you need and the application you plan to use it for


Our expert team will help you select the right product package, ensuring you have the accessories and support to get the best performance from your analyzer


Your analyzer will be assembled in one of our state-of-the-art engineering centers and rapidly dispatched to your site

The benefits of combined combustion analysis

The FluegasExact 2700 uses trusted Zirconia technology for oxygen sensing and a sulfur-resistant combustibles sensor, all in one compact combustion gas analyzer.

Flow sensor

Unique Flowcube technology enables positive flow conditions to be validated, enabling preventative maintenance and low-flow alarms.

Designed for hazardous conditions

With hazard ratings for ATEX Cat. 3, IECEx Zone 2 & North America Class 1, Division 2, the FluegasExact 2700 operates effectively in demanding process environments.

Extractive measurement principle

The FluegasExact 2700 ensures a long sensor life by keeping the sensors outside the harsh process conditions, in a heated enclosure.

Unrivalled performance

  • Uses industry-leading patented technologies (Zirconia cell and Thick Film Catalytic sensor) for ultra-accurate and reliable measurements
  • Manufactured by Servomex – over 60 years’ experience in pioneering gas analysis, with a global install base


  • Designed for Safe Area, Zone 2/Division 2 and ATEX Cat. 3 hazardous area rated locations
  • Robust O2 and COe analysis meets diverse application needs
  • Configurable sampling options for exact fit

Easy to use

  • Optional Flowcube technology provides continuous flow monitoring for preventative maintenance
  • Easy to maintain in the field

Low cost of ownership

  • Simple installation and low maintenance requirements
  • Extractive sampling design protects from harsh process conditions, extending product life
  • Long life, low-drift sensing technologies for reliability and extended calibration intervals
  • Engineered design that extends maintenance intervals and permits field service

Benchmark compliance

  • ATEX Cat. 3, IECEx Zone 2 & North America Class I, Div. 2

Gases sensed, measurements and technologies

With two sensing technologies combined in a single combustion flue gas analyzer, the FluegasExact 2700 provides high-temperature measurements for both oxygen and combustibles.

Gas Measurement
Oxygen (O₂)%
Combustibles (COe)ppm




  • ATEX Cat. 3
  • IECEx Zone 2
  • North America Class I, Div. 2
  • CE marked and in compliance with ATEX / IECEx, EMC and WEEE Directives scope. All variants comply with BS EN 61010

Schematics (select to expand)


Control unit: 391 x 167 x 260mm (15.4” x 6.6” x 10.3”)

Sensor head: 301 x 330 x 256mm (11.9” x 13.0” x 10.1”)

Flow alarm relay box: 120 x 120 x 80mm (4.7” x 4.7” x 3.1”)


30.5kg (67.2 lbs) (Combined weight) 

Get the detailed specifications

“For in-depth specifications you’ll want to download our technical datasheet which includes information on technology, performance, operating environment, sample conditions and compliance along with technical drawings and top-level benefits and applications.”

Keith Warren
Product Manager – Process Oxygen, Zirconia & Oxygen Deficiency

Get the complete FluegasExact 2700 information pack

“For all the data you need about the FluegasExact 2700 analyzer, download our comprehensive resources pack. It reveals all the features, benefits and technical specifications you’ll want to know.”

Keith Warren
Product Manager – Process Oxygen, Zirconia & Oxygen Deficiency

Manuals and brochures

Find out more about how the FluegasExact 2700 works and is installed, plus get an overview of its advantages and technical performance. Download the operator manual and product brochure now.

ES Magazine Issue 29 Clean Air

ES Magazine Issue 29 Clean Air

SERVOTOUGH FluegasExact 2700 QuickStart Manual

SERVOTOUGH FluegasExact 2700 QuickStart Manual

FluegasExact 2700 MiniPurge ATEX/IECEx Installation Manual

FluegasExact 2700 MiniPurge ATEX/IECEx Installation Manual

FluegasExact 2700 MiniPurge Class 1, Div 2 Installation Manual

FluegasExact 2700 MiniPurge Class 1, Div 2 Installation Manual

See for yourself

Our videos give you the chance to watch our products in action and hear from our experts. You can also see our analyzers unboxed, and find out more about our solutions for key applications

SERVOTOUGH FluegasExact 2700

Our product video focusing on the combined oxygen and combustibles analyzer 

Typical applications

Designed for use in hazardous and challenging conditions, the FluegasExact 2700 measures O2 and COe in a range of demanding power generation and hydrocarbon processing applications.

Process heaters | Utility boilers | Thermal crackers | Crematoria | Iron & steel | Incinerators | Biomass boilers 

Process heaters and furnaces

A choice of technologies to fit your application

Learn more

Coal-fired thermal power

Our total analytical solution delivers benefits in cost, process efficiency, safety and emissions across the process

Learn more

Carbon capture and storage

Extensive solutions for a range of carbon capture processes

Learn more

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