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The 4200/4210 analyzes up to four gases simultaneously in flammable samples

Designed specifically for the industrial gases market, the 4200/4210 provides high-specification multi-gas analysis of flammable gas samples and trace contaminants in applications including HyCO and Syngas mixtures.

A high-specification flammable gas monitor

Using accurate, reliable Servomex sensing technologies, the 4200 is able to measure up to four gas streams simultaneously, with measurements for oxygen (O2), carbon dioxide (CO2), carbon monoxide (CO), methane (CH4) and nitrous oxide (N2O).

The 4210 model offers resilient stainless steel pipework for monitoring higher concentrations of flammable gases.

Chris Davis
Product Manager

Unsurpassed performance

When you work in flammable gas production, 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 4200/4210 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
4200/4210’s flexibility to measure up to four gas streams simultaneously. This analyzer also delivers ease of use, facilitated by intuitive, engineer-friendly integrated LCD interface and a full suite of outputs including comprehensive digital communications. The 4210 variant offers resilient stainless steel pipework for additional application flexibility.

Simple maintenance and reduced ongoing costs

The 4200 delivers an affordable low low-cost of ownership with its low 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 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 4200/4210 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 flammable gas analysis

The 4200/4210 delivers unparalleled sensing capabilities for flexible flammable gas sample contaminate testing

Multi-gas capability

Using a combination of Paramagnetic and Photometric sensing, the 4200/4100 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 % O2, CO2, CO and CH/ trace level CO, CO2, N2O, CH4
  • Measures up to four flammable gas streams simultaneously
  • External analog input facility
  • RS232/RS485 serial data output and Modbus communications

Easy to use

  • Intuitive, engineer-friendly configuration via integrated LCD interface
  • Integrated storage for alarm, fault and calibration history logs
  • Simplified remote calibration

Low cost of ownership

  • Reduced ongoing operational needs via automatic calibration option
  • Easy set-up using integrated LCD and simple device installation

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

  • Meets the requirements of: EN 61010-3:2010 EN 61326-1: 2013

Gases sensed, measurements and technologies

The 4200/4210 measures up to four of the following gases simultaneously in flammable gas samples, 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


  • EN 61010-3: Safety requirements for electrical equipment for measurement, control and laboratory use
  • EN 61326-1: Electrical equipment for measurement, control and laboratory use
  • Installation Category II rated in accordance with IEC664

Schematics (select to expand)


483 mm (19”) Wide x 133 mm (5.2”) High x 478mm (18.8”) or 608 mm (23.9”) Deep max.


<22kg (48.4lbs)

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.”

Chris Davis
Product Manager

Download the resource pack for all the information you need

“Our 4200/4210 resource pack includes everything required to show how the analyzer can enhance the performance of your process, including a product brochure and operator manual.”

Chris Davis
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.

SERVOPRO 4000 Series Installation Manual

SERVOPRO 4000 Series Installation Manual

SERVOPRO 4200 Product brochure

SERVOPRO 4200 Product brochure

SERVOPRO 4000 Series Spares Brochure

SERVOPRO 4000 Series Spares Brochure

SERVOPRO 4000 Series Spares Options

SERVOPRO 4000 Series Spares Options

Typical applications

Specifically designed for industrial gas applications, the 4200/4210 provides multi-gas analysis for flammable sample gases.

Product quality validation in hydrogen plants | HyCO process control | Bottling/filling plants producing flammable gas blends

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