Servomex delivers the carbon dioxide measurements you need

Luke Purdie
Product Manager

Our range of carbon dioxide analyzers delivers the reliable and accurate measurements your process needs, using a choice of sensing technologies such as including Infrared, Plasma, and Gas Chromatography. Our products include CO2 combustion analyzers and CO2 purity analyzers, and are available as hazardous area, safe area, and portable instruments.

Why measure Carbon Dioxide ?

A common byproduct of combustion, carbon dioxide is a colorless gas which absorbs infrared radiation, acting as a greenhouse gas. It is closely regulated around the world as a harmful emission from many power generation and industrial manufacturing processes, and so must be monitored using CO2 gas analyzers. It is also a versatile industrial material, used in inerting operations and as a feedstock for the synthesis of fuels and chemicals. A CO2 gas analyzer may also be needed to monitor carbon dioxide as a trace impurity in industrial, medical, or semiconductor gases.

How CO2 gas analyzers work to measure carbon dioxide

A number of sensing technologies are available for our carbon dioxide gas analyzers. The most appropriate solution depends on the application, and the measurement range required.

  • Infrared sensing is a flexible measurement technology based on the unique light-absorbing properties of some gases, delivering a non-contact, real-time detection of the selected gas’s concentration in a mixture.
  • Gas Chromatography separates out the constituent components of a gas mixture, allowing relative concentrations to be determined. Under optimized conditions, it can measure down to parts-per-billion (ppb) levels, making it ideal for high-purity control processes.
  • Servomex’s Plasma emission detection technology was developed to provide a safer alternative to flame-based sensing for hydrocarbon analysis, and delivers ultra-low measurements. It provides highly sensitive and selective speciation, so is only suitable for trace analysis applications.
  • Spectroscopic technology combines innovative Infrared absorption spectroscopy, using advanced spectral scanning, with chemometrics, to deliver a high-quality optical measurement that is both accurate and highly stable.


SERVOPRO Servomex 4900 Multigas

Our key application solutions

Measuring CO2 emissions is a key part of any industry’s clean air strategy. The SERVOPRO 4900 Multigas CEMS analyzer provides continuous monitoring at ppm or percentage levels. For carbon capture processes, the versatile SERVOPRO MultiExact 4100 or MultiExact 4200 multi-gas analyzers are recommended.

Industrial process control measurements can be made by the SERVOTOUGH SpectraExact 2500 – for example in the manufacture of ethylene or ethylene dichloride. Because it is present in atmospheric air, CO2 is a common contaminant in ultra-high purity gases. The trace and ultra-trace measurement capabilities of the SERVOPRO Chroma, NanoChrome, and NanoChrome ULTRA make these CO2 gas analyzers ideal for this application.

Our solutions for Carbon Dioxide gas analysis

Servomex has a variety of carbon dioxide gas analyzer solutions available to suit different applications. For hazardous area processes, the SERVOTOUGH range includes the SERVOTOUGH SpectraExact 2500 photometric analyzer, which measures CO2 using Infrared and Spectroscopic sensing respectively. Infrared sensors also power our portable SERVOFLEX CO2 analyzers, the MiniMP 5200, and MiniHD 5200. Our safe area CO2 analyzers are in the SERVOPRO product range, and include the Infrared-sensing 4900 Multigas, MultiExact 4100 , and MultiExact 4200 multi, along with the Chroma, NanoChrome, and NanoChrome ULTRA, which all use Plasma sensing combined with Gas Chromatography.

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4900 Multigas


The 4900 Multigas is a high-performance CEMS analyzer designed for a wide range of multi-gas measurements.

  • Advanced digital multi-gas CEMS analysis
  • Up to four simultaneous gas stream measurements
  • Ultra-stable, accurate, non-depleting sensors
  • Auto-calibration for reduced operational needs
  • Intuitive-use icon-driven colour touchscreen
  • Digital communications for remote access



The Chroma is optimized to specific background gases to ensure optimum performance for your application.

  • Versatile, ultra-accurate trace gas analysis
  • Choice of non-depleting sensor technologies
  • Cost-effective solution for process control or quality monitoring
  • Works in a wide range of background gases
  • Compact 4U rack-compatible design
  • Flexible communication options

MiniHD 5200


The MiniHD 5200 portable gas analyzer is a rugged, heavy duty analyzer designed to accurately measure the levels of O2, CO and CO2 within common gas mixtures.

  • For field locations or light industrial applications
  • Measures O2, CO and CO2 in common gas mixtures
  • Portable analyser with a rugged and durable design
  • Uses digital Paramagnetic and Infrared sensing
  • Accurate measurements with no background interference
  • Intuitive, user-friendly interaction and interface

MiniMP 5200


The only truly portable battery-powered gas analyzer with MCERTS and TUV certification, offers single or dual measurement of oxygen (O2) and carbon dioxide (CO2).

  • High-performance oxygen and carbon dioxide analysis
  • Truly portable battery-powered gas analysis
  • Ideal for CEMS, with MCERTS and TUV certification
  • Accurate, long-life operation with minimal calibration
  • Combines Paramagnetic and Infrared technologies
  • Ideal for medical gas verification applications
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MultiExact 4100


A high-performance multi-gas analyzer designed to provide up to four simultaneous gas stream measurements.

SERVOPRO MultiExact 4100
  • Highly adaptable multi-gas analyzer
  • Provides up to four simultaneous measurements
  • Wide range of sensing technology options
  • Versatile solution for industrial and medical gases
  • Built-in support for moisture sensor
  • Optional advanced digital protocols

MultiExact 4200


The MultiExact 4200 analyzes up to four gases simultaneously for Syngas and HyCO

  • For HyCO, Syngas, H2, and gas transfer applications
  • A high-specification multi-gas analyser
  • Measures up to four gas streams simultaneously
  • Combines industry-leading sensing technologies
  • Low cost of ownership and minimal maintenance
  • Intuitive-use icon-driven colour touchscreen



Incorporating the latest advances in gas sensing and signal processing methodology, the NanoChrome revolutionizes ultra-trace purity measurements.

  • Ultra-trace purity measurements in UHP gases
  • Designed for semiconductor manufacturing
  • Uses advanced Plasma Emission Detector sensor
  • Sensitive ProPeak software for high accuracy
  • Removes the need for flammable fuel gas
  • Comprehensive reporting and statistical analysis

NanoChrome ULTRA


Using proven ultra-trace sensing, the NanoChrome ULTRA conquers the most stringent demands of the semiconductor industry, delivering a cost-effective solution compared to competing technologies.

  • The top choice for ultra-trace purity measurements
  • Designed for the semiconductor wafer industry
  • Superior measurements of ultra-high-purity gases
  • Highly specific, non-depleting PED sensing
  • ProPeak filtering for highly sensitive measurements
  • Removes the need for flammable fuel gas



A getter-based purification unit designed for the purification of carrier gases used in Gas Chromatography (GC) and other analytical applications

  • Getter-based purification unit
  • Designed for carrier gases used in Gas Chromatography
  • Reduces outlet impurity levels to ppb or below
  • Removes impurities by forming irreversible chemical bonds
  • Efficient ceramic fibre insulation
  • Built to operate continuously, without servicing

SpectraExact 2500

SERVOTOUGH Hazardous Area

Flexible single and multicomponent gas analysis capability for corrosive, toxic and flammable sample streams.

  • Rugged, reliable photometric analysis
  • Designed for continually flammable samples
  • Suitable for hazardous area applications
  • Ideal for diverse gas sample types
  • Uses field-proven non-depleting technologies
  • Certified for gases

Proven carbon dioxide sensing technologies

Our carbon dioxide analyzer range uses proven sensing solutions that deliver accuracy, ease of use, and a long operational life.

Gas Chromatography delivers high-purity analysis

Gas Chromatography is an analysis technique that works effectively alongside other sensing technologies, delivering a highly sensitive measurement of the constituent components of a gas sample. It is used in our SERVOPRO Chroma, NanoChrome, and NanoChrome ULTRA analyzers.

Learn more about Gas Chromatography technology

Real-time Infrared measurements of gases in a mixture

Infrared sensing is a flexible measurement technology based on the unique light-absorbing properties of some gases. It delivers a non-contact, real-time detection of the selected gas’s concentration in a mixture, and is widely used in our analyzer range, including portable analyzers, photometric products, and multi-gas analyzers.


Learn more about Infrared technology

Plasma delivers a highly specific, stable gas measurement

Developed to provide a safer alternative to flame-based sensing for hydrocarbon analysis, Servomex’s Plasma emission detection technology delivers ultra-low gas measurements. It is used in our SERVOPRO Chroma, NanoChrome, and NanoChrome ULTRA analyzers.

Learn more about Plasma technology

Real-time Spectroscopic sensing for light hydrocarbons

Servomex’s Spectroscopic sensing technology is a revolutionary measurement for light hydrocarbons C1-C5+, where innovative NIR/IR absorption spectroscopy with state-of-the-art spectral scanning is coupled with advanced chemometric-based data processing.


Learn more about Spectroscopic technology

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Find out how we can support your carbon dioxide gas analysis requirements with these resource

ES Magazine Issue 41 Reliable solutions for industrial gas applications

ES Magazine Issue 41 Reliable solutions for industrial gas applications

ES Magazine Issue 37 Clean Air Part 2

ES Magazine Issue 37 Clean Air Part 2

ES Magazine Issue 36 Purity & Specialty

ES Magazine Issue 36 Purity & Specialty

Application Note Purified Terephthalic Acid (PTA)

Application Note Purified Terephthalic Acid (PTA)

Expert solutions for your carbon dioxide application

CO2 analysis is critical to a range of applications in many industries. See how we provide the analyzer you need for your specific process.

Coal-fired thermal power

Our total analytical solution delivers benefits in cost, process efficiency & safety.

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Ethylene production

We have the solutions to make your process more efficient

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Process heaters and furnaces

A choice of technologies to fit your application

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Medical gases

An advanced solution for purity assay and impurity detection

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Explore our full range of applications

Servomex – gas analysis to empower a changing world

Servomex is the global leader in gas analysis, providing solutions for cleaner, more efficient industries, and enabling the manufacture of products that benefit everyone. With 70 years of expertise and research behind us, we deliver industry-changing gas analysis measurements for process control, quality, safety, emissions monitoring, and combustion efficiency.

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Global service support delivered locally

Wherever you are in the world, our network of service engineers provides the expertise you need to keep your ammonia analyzer operating at peak performance. With state-of-the-art service centers around the globe, you’ll always have the support your process needs.

Service team meeting customer

We provide tailored service packages that support your product throughout its life

Our global service network delivers the support you need to keep your analyzer or system operating at peak performance, for total peace of mind.

Broadly, we categorise our customers into two distinct groups

Purity & Speciality

Our Purity & Specialty (P&S) team provides products, knowledge and service to market sectors including industrial and medical gases, UHP gases, and semiconductor manufacture

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Industrial process & Emissions

Our Industrial Process & Emissions (IP&E) division is responsible for our gas analysis solutions in the power generation, hydrocarbon processing and emissions monitoring markets

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Choose the experts in Carbon Dioxide gas analysis


We consult with you to determine what you need

Our team stays in place throughout the project, ensuring consistent communication. This starts with identifying the parameters that the system must meet to ensure optimum performance and ease of use.

We design and build your system in our dedicated facility

Our schematics and documents are reviewed by the customer until the final design is agreed upon. Our skilled engineers then assemble the system at one of our cutting-edge regional centers, with continuous evaluation throughout the build process.

We test and deliver your integrated solution

After internal testing and an intensive Factory Acceptance Test (FAT), the finished system is shipped for installation. Our expert support team can commission and calibrate the system and provide any necessary operator training.

The Servomex difference is clear from the start, all the way through to the delivery of carbon dioxide gas analysis system that will transform your process.

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