Get trusted carbon monoxide measurements for your process

Rhys Jenkins
Rhys Jenkins
IP&E Spectroscopic Product Manager

If you need to measure carbon monoxide (CO) for process control or safety applications, we have the gas analysis solutions required. Servomex delivers expert solutions for carbon monoxide measurements, using a range of sensing technologies for the best fit to your process. Our CO gas analyzer range utilizes technologies including Infrared, Plasma, and Gas Chromatography for low-level impurity detection, and Tunable Diode Laser or Spectroscopic sensing for combustion safety and process control. Servomex CO analyzers are available for both safe area and hazardous area operation.

Why measure carbon-monoxide?

Carbon monoxide measurements are needed for a wide range of different applications including combustion control, emissions monitoring, and gas purity. CO is frequently generated as a by-product when incomplete combustion of fuels takes place due to insufficient oxygen. It is also used in the manufacture of several chemical products. Carbon monoxide can be a health hazard, so is monitored for plant safety, and also in emissions monitoring under environmental regulations.

How CO gas analyzers work to measure carbon monoxide

Several sensing technologies are available to measure carbon monoxide. 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.
  • Tunable Diode Laser sensing is highly specific to the target gas, and offers a fast, highly stable, continuous cross-stack measurement, ideal for process and combustion control applications.
  • 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 solutions

Since CO is measured in a wide variety of applications, at various ranges and under diverse process conditions, Servomex has developed a number of solutions to ensure the best-fit CO gas analyzer in each application. For example, the SERVOPRO 4900 Multigas uses Infrared sensing to measure CO for continuous emissions monitoring, while the SERVOTOUGH Laser 3 Plus Combustion Tunable Diode Laser analyzer measures CO for combustion efficiency and safety, and the SERVOPRO NanoChrome ULTRA utilizes Plasma sensing combined with Gas Chromatography to deliver parts-per-billion or parts-per-trillion level measurements of CO as an impurity in semiconductor manufacturing.

Our solutions for carbon-monoxide gas analysis

Servomex’s carbon monoxide gas analyzer range offers products suitable for safe area and hazardous area operations, and also includes a portable CO analyzer.

The SERVOTOUGH hazardous area CO gas analyzers include the Laser 3 Plus Combustion analyzer, which measures ppm CO for combustion control, the SpectraExact 2500 for % or ppm process measurements, and the SpectraScan 2400 optical gas analyzer for % or cv measurements.

Safe area SERVOPRO analyzers include the Infrared sensing of the versatile MultiExact 4100 and MultiExact 4200, and the CEMS analysis of the 4900 Multigas, with trace and ultra-trace measurements provided by the SERVOPRO Chroma, NanoChrome, and  NanoChrome ULTRA

For rugged, heavy-duty portable analysis, the SERVOFLEX MiniHD 5200 delivers percent-level CO measurements using Infrared sensing.

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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

Laser 3 Plus Combustion

SERVOTOUGH Hazardous Area

Unmatched installation flexibility plus cost and performance benefits, ready for fast, accurate and responsive measurements in combustion and process control.

Laser 3 Plus Combustion Tunable Diode Laser
  • Configured to measure O2, CO, or CO and CH4
  • Highly compact gas monitor
  • Ideal for in-situ cross-stack applications
  • Uses Wavelength Modulated Spectroscopy (WMS)
  • Easily installed by a single engineer
  • Reliable line lock cuvette technology

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

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 2500F

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 monoxide sensing technologies

Our carbon monoxide 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 Plasma, 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. It is used in our innovative SERVOTOUGH SpectraScan 2400 analyzer.

Learn more about Spectroscopic technology
Tunable Diode Laser

Obtain fast, in-situ cross-stack measurements with TDL sensing

Tunable Diode Laser (TDL) technology offers a fast-response, accurate measurement that is highly specific to the gas of interest. This non-contact, non-depleting sensing is used in our innovative, compact SERVOTOUGH Laser 3 Plus range of analyzers.

Learn more about TDL technology

Download more information

Find out how we can support your Carbon Monoxide gas analysis requirements with these resources.

Servomex Gas Guide issue 4

Servomex Gas Guide issue 4

SERVOTOUGH Laser 3 Plus Combustion Product Brochure

SERVOTOUGH Laser 3 Plus Combustion Product Brochure

SERVOPRO NanoChrome ULTRA- Quick Start Guide

SERVOPRO NanoChrome ULTRA- Quick Start Guide

SERVOPRO NanoChrome – Quick Start Guide

SERVOPRO NanoChrome – Quick Start Guide

Carbon monoxide measurement solutions for your application

Carbon monoxide measurements are needed for many different applications including combustion control, emissions monitoring, and gas purity.

Process heaters and furnaces

A choice of technologies to fit your application

Learn more

Medical gases

An advanced solution for purity assay and impurity detection

Learn more

Carbon capture and storage

Extensive solutions for a range of carbon capture processes

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Coal-fired thermal power

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

Learn more

Ethylene production

We have the solutions to make your process more efficient

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Purified Terephthalic Acid

An effective solution for hazardous environments

Learn more

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

Learn more

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

Learn more

Choose the experts in carbon monoxide 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 delivery of a carbon monoxide gas analysis system that will transform your process.

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