Servomex delivers the expert solution for methane measurements

Rhys Jenkins
Rhys Jenkins
Product Manager

Our range of methane gas analyzers provides accurate monitoring of CH4 in your process, using a variety of sensing technologies to deliver the best measurement results for each application. We offer the SERVOTOUGH SpectraExact 2500 and Laser 3 Plus Combustion as hazardous area methane testers, and a number of safe area SERVOPRO analyzers for industrial gas and purity applications. These include the MultiExact 4100, MultiExact 4200, HFID, Chroma, NanoChrome, and NanoChrome ULTRA gas analyzers. For CEMS applications, we have the 4900 Multigas, rounding off a comprehensive set of solutions for methane gas analysis.

Why measure methane?

Methane is a hydrocarbon, and the main constituent of natural gas. As a greenhouse gas, methane emissions must be monitored in industrial processes to meet regulatory requirements. Monitoring methane in combustion is also an important safety measure. It is also key to safety and process efficiency in a number of industrial processes, including ethylene and EDC manufacture. Additionally, methane can contaminate high-purity gases needed for medical or industrial use, so must be monitored at trace and ultra-trace levels to ensure gas quality.

Measuring methane for safety in combustion

Fired heaters running in a steady state are very safe, and can be trimmed and controlled by measuring oxygen and combustible concentrations. However, changes to the ambient conditions, fuel composition, or pressure regulation can snuff out the flame or alter its profile to become heavily fuel-rich. These changes can create a pocket of methane on a bank of two or three burners, inside a working process. Normally undetected by point measurements, this potentially leads to a flood of methane coming up through the process. By measuring methane across the process using a Tunable Diode Laser analyzer – such as the SERVOTOUGH Laser 3 Plus Combustion – a bank or array of burners going out can be rapidly detected, allowing immediate corrective action.

How CH4 gas analyzers work to measure methane

Several sensing technologies are available to measure methane. The most appropriate solution depends on the application, and the measurement range required.

  • Gas Filter Correlation sensing is an advanced Infrared-based 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.
  • Flame Ionization Detector (FID) technology is designed to measure total hydrocarbons down to parts-per-billion (ppb) levels. By combining a FID sensor with a non-methane cutter, it can be used to measure methane concentrations as well.

Our solutions for Methane gas analysis

We support many applications with methane gas analysis solutions, ranging from power generation and hydrocarbon processing (HP) to medical gas purity and semiconductor gas quality. For power, HP, and emissions, our methane analyzers include the SERVOTOUGH SpectraExact 2500 and SERVOPRO analyzers such as the MultiExact 4100, MultiExact 4200, HFID, and 4900 Multigas. These methane gas analyzers use Gas Filter Correlation or Flame Ionization Detector sensing to measure CH4. For the trace and ultra-trace measurements of methane required by industrial, medical, and UHP gases, Gas Chromatography and Plasma sensing technologies are required. We provide the Chroma, NanoChrome, and NanoChrome ULTRA analyzers.


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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



Utilizes an internally heated oven set to 190°C (374°F) to maintain the sample gas above its dew point, for optimum performance in total hydrocarbon analysis (THC).

  • Highly sensitive trace hydrocarbon analyser
  • Ideal for vehicle/engine certification testing
  • Heated FID for volatile hydrocarbon concentrations
  • Delivers real-time, on-stream gas analysis
  • Cutter system removes non-methane hydrocarbons
  • Four user-definable measurement range 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

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 methane sensing technologies

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

FID sensing delivers highly accurate total hydrocarbon measurements

Flammable hydrocarbon samples can be measured at very low levels with our Flame Ionization Detector (FID) sensors. Based around the detection of ions formed by combustion, they are key to the sensitive, accurate measurements delivered by our SERVOPRO Chroma, FID, and HFID analyzers. It must be combined with a non-methane cutter assembly to measure methane concentrations.

Learn more about Flame Ionization Detector technology

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
Gas filter correlation

Gas Filter Correlation sensors deliver stable, ultra-accurate gas analysis

An advanced form of Infrared sensing, Gas Filter Correlation (GFC) technology is ideal in applications with interferent background gases, delivering precise, sensitive measurements. It is used in our SERVOTOUGH SpectraExact 2500 photometric analyzer, and is a key technology for our SERVOPRO multi-gas analyzers, the MultiExact 4100, MultiExact 4200, and 4900 Multigas.

Learn more about GFC 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
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 Methane process with these resources.

Servomex Gas Guide issue 4

Servomex Gas Guide issue 4

SERVOPRO NanoChrome ULTRA- Quick Start Guide

SERVOPRO NanoChrome ULTRA- Quick Start Guide

SERVOPRO NanoChrome – Quick Start Guide

SERVOPRO NanoChrome – Quick Start Guide

SERVOPRO Chroma – Quick Start Guide

SERVOPRO Chroma – Quick Start Guide

We provide methane measurement solutions for these applications

Learn more about how we can support your process with innovative and effective methane analysis

Process heaters and furnaces

A choice of technologies to fit your application

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Air separation units

Diverse sensing solutions that adapt to your process

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Medical gases

An advanced solution for purity assay and impurity detection

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UHP Gases / Semiconductors

A comprehensive systems solution

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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 oxygen 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

Learn more

Choose the experts in Methane gas analysis

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

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.

Choose the experts in Methane gas analysis

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

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