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

Designed specifically for the industrial gases market, the MultiExact 4200 provides high-specification multi-gas analysis of flammable gas samples and trace contaminants in applications including HyCO, Syngas, hydrogen production, and gas transfer applications.

A high-specification industrial gas monitor

Using accurate, reliable Servomex sensing technologies, the MultiExact 4200 is able to measure up to four gas streams simultaneously, with percentage measurements for oxygen (O2), carbon dioxide (CO2), and carbon monoxide (CO). It can also be configured to measure percentage CO and CH4, and ppm-level CO, CO2, CH4 and nitrous oxide (N2O).

It is the second generation of Servomex’s 4200 Series analyzers, which have provided trusted and reliable measurements for industry for more than 20 years.


Rhys Jenkins
IP&E Spectroscopic Product Manager

Unsurpassed performance

When you work in flammable gas production or trace contaminant monitoring, you need an analytical solution that can adapt to varying sampling needs, with the highest performance provision and reliability. The flexibility to measure percent and trace gas levels is imperative as is the ability to monitor multiple gas streams simultaneously. No matter what your application requirements, you’ll want a flexible, feature-rich device that reduces ongoing costs. We don’t believe you should have to compromise.

A no-compromise solution

The MultiExact 4200 is specifically designed to address your exact needs, with its combination of industry-leading patented sensing technologies – Paramagnetic, SBSW IR and Gfx IR – delivering percent and trace measurements. Added to its impressive performance capability is the analyzer’s flexibility to measure up to four gas streams simultaneously. The MultiExact 4200 also delivers ease of use, facilitated by intuitive, engineer-friendly integrated LCD interface and a full suite of outputs including comprehensive digital communications.

Simple maintenance and reduced ongoing costs

The MultiExact 4200 delivers an affordable low cost of ownership with its minimal maintenance requirements. The use of highly stable and ultra-selective sensing technologies with low drift potential help to extend calibration periods, whilst aspects like auto-calibration simplify ongoing device operation considerably. Overall, the MultiExact 4200  provides the complete, reliable and affordable solution to flammable industrial gas production.

Building a gas analysis system? We can help

If you’re looking to integrate the MultiExact 4200 into your new or existing system, then we can provide expert advice. Contact our experienced systems team to learn more.

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

See the benefits of trace multi-gas analysis

The MultiExact 4200 delivers unparalleled sensing capabilities for HyCO, Syngas, and hydrogen production

Multi-gas capability

Using a combination of Paramagnetic and Photometric sensing, the MultiExact 4200 delivers accurate, sensitive measurements for four gases simultaneously.

Low cost of ownership

Simplified, cost-effective ongoing maintenance is delivered through easy intuitive integrated menu configuration. Non-depleting, ultra-low drift, high stability sensors ensure extended calibration intervals.

Easy set-up

Intuitive, engineer-friendly configuration is provided via an integrated LCD interface and flexible RS232/RS485 and Modbus communications.


  • Measures CO2, CO and CH4, and ppm CO, CO2, N2O, and CH4.
  • Measures up to four gas streams simultaneously
  • External analog input facility
  • RS232/RS485 serial data output and Modbus communications

Easy to use

  • Intuitive integrated LCD interface
  • Alarm, fault and calibration history logs
  • Simple calibration

Low cost of ownership

  • Reduced ongoing operational needs via automatic calibration option

Unrivalled performance

  • Uses industry-leading, patented Paramagnetic and SBSW/Gfx IR technologies for ultra-stable, accurate and selective measurements
  • Manufactured by Servomex – over 60 years’ experience innovating and pioneering gas analysis and thousands of units used in the field every year

Benchmark compliance

  • In compliance with Low Voltage, EMC and applicable EU Directives
  • Suitable for use with potentially flammable samples

Gases sensed, measurements and technologies

The MultiExact 4200 can be configured to measure up to four of the following gases simultaneously, at percentage or trace levels.

Gas Measurement
Oxygen (O₂)%
Carbon dioxide (CO₂)%, ppm
Nitrous oxide (N₂O)ppm
Carbon monoxide (CO)%, ppm
Methane (CH₄)%, ppm


Paramagnetic Infrared Gas filter correlation


  • This product complies with the EMC Directive, the Low Voltage Directive, and all other applicable directives
  • Electrical safety to EN 61010-1
  • Rated for “Overvoltage Category II” and “Pollution Degree 2”

Schematics (select to expand)


Bench top: 432mm (17”) wide x 141.2mm (5.6”) high x 543.6mm (21.2”) deep

Rack mount: 482.6mm (19”) wide x 132.5mm (5.2”) high x 543.6mm (21.2”) deep


Main unit: approx. 14kg (30.9lb)

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.”

Rhys Jenkins
IP&E Spectroscopic Product Manager

Download the resource pack for all the information you need

Our MultiExact 4200 resource pack includes everything required to show how the analyzer can enhance the performance of your process, including a product brochure and operator manual.

Rhys Jenkins
IP&E Spectroscopic Product Manager

Manuals and brochures

Find out how to install and operate this product by downloading the brochure and manual. Features, benefits and technical information are all included.

ES Magazine Issue 29 Clean Air

ES Magazine Issue 29 Clean Air

SERVOPRO MultiExact 4200 Installation and Operator Manual

SERVOPRO MultiExact 4200 Installation and Operator Manual

SERVOPRO MultiExact 4200 Quick Start Guide

SERVOPRO MultiExact 4200 Quick Start Guide

SERVOPRO MultiExact 4200 Product brochure and technical data

SERVOPRO MultiExact 4200 Product brochure and technical data

See for yourself

See the MultiExact 4200 in action with our product video, and hear the views of our experts. You can also learn about our solutions for key applications.

SERVOPRO MultiExact 4200 Installation and Operator Manual

SERVOPRO MultiExact 4200 Installation and Operator Manual

SERVOPRO MultiExact 4200 Quick Start Guide

SERVOPRO MultiExact 4200 Quick Start Guide

SERVOPRO MultiExact 4200 Product brochure and technical data

SERVOPRO MultiExact 4200 Product brochure and technical data

Typical applications

Specifically designed for industrial gas applications, the MultiExact 4200 provides multi-gas analysis for trace contaminants in Syngas, HyCO and hydrogen production applications.

Hydrogen plants | HyCO process control | Syngas analysis | Bottling/Filling plants

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