SERVOPRO safe area

The MonoExact DF310E oxygen and moisture analyzer is designed for industrial gas applications

Designed specifically for accurate measurements of oxygen and moisture in industrial gas (IG) applications, the MonoExact DF310E is a digital analyzer combining precision trace-level measurement with a new icon-driven guided user interface (GUI) and advanced digital communications.

A touchscreen oxygen and moisture analyzer for IG applications

A next-generation oxygen (O2) and moisture (H2O) analyzer designed for various industrial gas (IG) applications, the MonoExact DF310E combines trace-level measurement with new performance and operational benefits.

Built around the latest innovations in software and hardware – including a non-depleting Paramagnetic and updated Coulometric digital oxygen sensor – it offers enhanced user control and a reduced cost of ownership.

It also offers plug-and-play capability to operate the AquaXact Al2O3 probe for a dual measurement of oxygen and moisture. When connected to the moisture sensor, the screen is designed to simultaneously display both oxygen and moisture measurements.

Comprehensive analog and digital communication options ensure simple integration into a wide range of systems.

Douglas Barth
Senior Global Product Manager

The definitive solution for IG gas production and bottling and blending

The MonoExact DF310E has been designed specifically to accurately measure oxygen and moisture in various industrial gas (IG) applications including nitrogen, argon and hydrogen production*‡, tanker transfil, specialty gas blending and electronic gases production. Combining Servomex’s latest advances in sensing technology and analyzer design into an advanced new platform, the DF310E is easy to operate and integrate into a wide range of systems.

Simple maintenance and reduced ongoing costs

Built around the latest innovations in sensing technology combined with advance software and hardware – including a non-depleting paramagnetic* and digital coulometric oxygen sensor – MonoExact DF310E builds on the original DF-310E with touchscreen operation, features to aid in commissioning and self-diagnostics monitoring benefits that improves user control and reduces cost of ownership. Updating firmware, downloading diagnostic files and copying the analyzer setup to transfer to another unit of identical configuration takes just a few clicks.

A no compromise solution

Offering comprehensive analog and digital communication options for simple integration into a wide range of systems. Includes a Flat Line Alarm that monitors sensor measurements at LDL thresholds. MonoExact DF310E is backward-compatible with existing DF-310E installations, ensuring it complies with existing standards and customer agreements without the need for re-testing or re-qualification.

Need a new system? We’re here to help

We’re the experts in gas analysis. If you’re building a new system, get in touch. We provide collaborative project management from start to finish, delivering a system that meets your exact process specifications.

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

Next-generation IG oxygen and moisture analysis

The MonoExact DF310E delivers a range of performance and operational benefits for IG operators

Paramagnetic sensor option

The MonoExact DF310E can be fitted with Servomex’s Paramagnetic sensor for percentage level measurements of O2.

Simultaneous dual-measurement

Designed to connect with an optional AquaXact 1688 sensor, the MonoExact DF310E can provide accurate O2 and H2O readings at the same time.

Touchscreen operation

An advanced color touchscreen with guided user interface (GUI) provides the MonoExact DF310E with intuitive set-up and operation.


  • Back-compatible with DF-310E platform, including hardware wiring inputs and gas inlets
  • Analog and digital outputs – 4-20mA, RS232, RS485 and advanced digital communications including Ethernet Modbus, Modbus TCP/IP and PROFIBUS
  • Optional integration of external AquaXact aluminum oxide (Al2O3) moisture sensor probe to allow for two measurements with one analyzer.

Easy to use

  • Compact footprint for simple integration
  • Advanced touchscreen GUI for intuitive hands-on setup and operation
  • Servomex proprietary software makes reporting and parameter control simple

Low cost of ownership

  • Field proven Servomex Coulometric electrochemical performance and reliability
  • Non-depleting Paramagnetic sensor option
  • Five year replacement warranty on electrochemical sensor
  • Minimal training requirements

Unrivalled performance

  • Utilizes enhanced Hummingbird sensing technology for precision process measurement
  • 100, high resolution 100, 1000 and 10000 ppm ranges available (Coulometric) / 0-25% (Paramagnetic)
  • Manufactured by Servomex – over 60 years’ experience innovating and pioneering gas analysis and thousands of units used in the field every year

Benchmark compliance

  • Complies with Low Voltage, EMC and applicable directives
  • European and US Pharmacopeia compliant (Coulometric and Paramagnetic)

Gases sensed, measurements and technologies

The MonoExact DF310E provides digital Coulometric sensing for O2 measurements, with the capability to fit a Paramagnetic sensor for % O2. It can also connect to the AquaXact 1688 Aluminum Oxide sensor for simultaneous O2 and H2O monitoring.

Gas Measurement
Oxygen (), ,
Water Vapour (Moisture) (),



  • IEC 61010-1
  • Overvoltage Category II, Pollution Degree 2
  • EU EMC Directive
  • EU Low Voltage Directive

Schematics (select to expand)


206mm (8.1”) Wide x 131 (5.2”) High x 245mm (9.7”) Deep


4.3kg (9.5lbs)

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.”

Douglas Barth
Senior Global Product Manager

Get all the MonoExact DF310E information you need

“We’ve collected all the essential details about the MonoExact DF310E into a complete resource pack. To learn more about the features and benefits of this next-generation oxygen and moisture analyzer, download it now.”

Douglas Barth
Senior Global Product Manager

Typical applications

With a choice of Coulometric and Paramagnetic O2 sensing technologies, and optional plug-and-play capability to operate the AquaXact Al2O3 moisture probe, the MonoExact DF310E is designed to provide flexible gas analysis for a variety of industrial gas applications.

Nitrogen production | Argon production | Hydrogen production | Tanker transfill applications | Specialty gas blending | Electronic gas verification

Air separation units

Diverse sensing solutions that adapt to your process

Learn more

Medical gases

An advanced solution for purity assay and impurity detection

Learn more

© Copyright 2020 - Servomex è una società Spectric.
Click here to download your selected documents