Learn more about our expert team, key divisions and how they provide solutions for a wide array of industrial markets.
With a broad product portfolio, we have the best-fit technologies to meet your application needs.
Our stable, reliable gas analysis solutions measure over 20 gases with industry-leading accuracy and stability.
Our expertise and single-supplier solutions help improve an extensive range of industrial processes.
We offer accurate and reliable gas analysis for hazardous and safe area applications, including ultra-low detection and portable products.
Find the right gas analysis solution for your process. Our finder allows you to select by key parameters including the gas sensed, the technology used, and the measurement needed.
Looking for details on an out-of-production analyzer? Find all the information you need for support here.
From a single analyzer with sampling system to an air-conditioned shelter, our expert team can deliver scalable solutions to meet your process needs.
Are you prepared to talk about your custom support package?
We provide service products customized to meet your precise process uptime requirements.
Find high-quality spare parts and consumables with fast delivery. Our brochures list the authorised spare resources for your gas analyzer.
To report a fault for a product under warranty, fill in the form here for a timely response.
Servomex is committed to a sustainable approach towards people and operations across our organization.
Our global business is built on an essential set of values that underpin our work, decision-making, and culture.
Become a valued part of the Servomex team and forge your career path with the global leaders in gas analysis.
Learn about the roles of some of our key people and find out what made them choose to work at Servomex.
If you want a career with meaning, working with the best global talent, check out our latest vacancies.
We have career paths to suit every level, from apprentices and graduates to experienced leadership roles.
Search through our full range of magazines, videos, manuals, white papers, and more to find the information you need.
Search by category to get more information from our extensive range of product and application resources.
Stay up to date with the latest from Servomex and the world of gas analysis, including new product releases and industry events.
Used to measure oxygen (O2), Coulometric sensing is based on a simple, non-depleting process that responds quickly to changing O2 levels. The heart of our DF-500 range of oxygen sensors, it delivers the low-level detection that is essential for UHP gas applications.
Our Coulometric technology enables the measurement of O2 at parts-per-million (ppm) to parts-per-trillion (ppt) levels. It is non-depleting, so there is no requirement for periodic cell replacement and it avoids the false low readings associated with standard electrochemical sensors.
It operates through a simple Coulometric process where O2 from the sample gas is reduced to hydroxyl ions at the sensor cathode.
The resulting current flow is proportional to the O2 content in the gas, and the process signal can be displayed in parts-per-million (ppm) to parts-per-trillion (ppt) units of O2.
Coulometric sensors respond very quickly to changing O2 concentrations. For instance, a 0-1,000ppm range sensor can be exposed to air and in less than a minute will measure <10ppm on pure nitrogen. This is highly beneficial for users who have upset-prone applications.
Additionally, the performance of the sensor is unaffected by reasonable changes in flow rate.
Because the non-depleting sensor is not consumed when exposed to O2, it has a long lifespan and does not require a purge gas to protect it when not in use.
Coulometric sensing works alongside Laser Moisture technology in our DF-760E and DF-760E ULTRA analyzers, for a highly sensitive dual measurement of oxygen and moisture at ppm levels. Coulometric sensors should avoid sample streams that contain acidic gases. For applications involving these gases, a Paramagnetic or Zirconia sensor is recommended instead.
Semiconductors
Solder reflow ovens
Reactor process control
Industry-leading lower detection limits
Fast response and rapid recovery
Non-depleting sensor with a long lifespan
Sensitive, measurements of O2, for example in impurity monitoring for UHP semiconductor gases
Learn more about all our gas analyzer solutions that use this sensor technology.
Designed for quality control applications in UHP bulk gases, the compact DF-760E analyzer is a unique solution for the dual measurement of trace and ultra-trace moisture
Designed for industry-leading quality control measurements in UHP bulk gases, the compact DF-760E ULTRA is a unique dual-analysis solution for trace and ultra-trace moisture and oxygen.
The MonoExact DF150E combines the reliability of Servomex’s tried and tested Coulometric oxygen sensor with a more user-friendly package.
Designed specifically for accurate measurements of oxygen in industrial gas (IG) applications.
Empower your ultra-high-purity (UHP) gas with Gen-7 of our SERVOPRO DF-500 series of Coulometric analyzers for ultra-trace oxygen measurements.
An ultra-trace Coulometric oxygen analyzer, the DF-550E is optimized for quality measurements in ultra-high-purity electronic gases.
A superior quality control solution for ultra-high-purity (UHP) electronic grade gases, the DF-560E Ultra delivers an industry-best detection of 45 parts per trillion for oxygen (O2).
Get a free copy of our special Expert Solutions magazine focusing on our complete range of sensing technologies. It’s available to download now.
If you still need guidance to find the best solution for your process, we’re here to help. Our expert team combines applications knowledge with extensive experience and deep understanding of the sensing technologies available. We’ll help you find the solution that meets your unique needs.