Your expert solution for propane gas analysis

Rhys Jenkins

Servomex provides reliable, non-contact propane sensor technology for LPG analysis and a wide range of industrial applications. Our iconic, industry-leading SERVOTOUGH SpectraExact 2500 photometric analyzer delivers flexible real-time propane measurements in continually flammable sample streams in hazardous areas. Get the propane analysis solution you need to support your process.

Why measure propane?

Propane (C3H8) is a hydrocarbon and one of the group of liquefied petroleum gases (LPGs). It can be produced as a by-product of natural gas processing and petroleum refining, so may require monitoring for process control. Propane is commonly used as a feedstock for the production of base petrochemicals such as propylene. In these cases, measuring propane purity, using an effective propane gas monitor, is essential to ensure process efficiency and a high-quality product. Propane may also need to be monitored for safety, as it can pose an explosion risk in some processes.

Propane measurement in propane dehydrogenation

The propane dehydrogenation process is used to convert propane into propylene – a fundamental component of the widely used polypropylene plastic, with hydrogen as a by-product. Propane measurements are required at the beginning and end of the process. A SpectraExact 2500 measures percent-level propane in the fresh propane feed to ensure purity. At the end of the process, a propylene-propane splitter is used to separate the required product from propane that can be recycled back into the process. A second SpectraExact 2500 monitors this split by measuring percent-level propane, protecting product quality and ensuring effective recycling.

How propane gas analyzers work to measure C3H8

The SpectraExact 2500 uses photometric sensing technologies to measure propane in the range required for the specific application.

  • 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.
  • Infrared sensing is a flexible 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.

Our solutions for propane gas analysis

Designed for demanding process applications, the rugged and versatile SERVOTOUGH SpectraExact 2500 delivers propane gas analysis capability for flammable sample streams, using Infrared and Gas Filter Correlation sensing.

SERVOTOUGH SpectraExact 2500

Real-time photometric analysis in demanding process applications

Rhys Jenkins

A highly flexible analytical solution adaptable to many applications, the SERVOTOUGH SpectraExact 2500 delivers proven performance and flexible operation in a resilient and reliable design.

It adapts to your process effortlessly to deliver a real-time online monitoring solution configurable to measure a wide range of components including percent-level propane. Field mounting capabilities enable flexible use in the harshest process conditions.

Highly affordable, the SpectraExact 2500 uses an intelligent design and non-depleting sensing technologies to help to extend maintenance intervals and dramatically reduce ongoing costs.

Proven propane sensing technologies

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

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

Real-time Infrared measurements of gases in a mixture

Infrared sensing is a flexible measurement technology based on the unique light-absorbing properties of some gases. It delivers a non-contact, real-time detection of the selected gas’s concentration in a mixture, and is widely used in our analyzer range, including portable analyzers, photometric products, and multi-gas analyzers.

Learn more about infrared technology

Propane analysis resources

For more in-depth information about our propane analysis solutions, download our additional expert resources

SERVOTOUGH SpectraExact 2500——认证、批准文档和条件手册

SERVOTOUGH SpectraExact 2500——认证、批准文档和条件手册

SERVOTOUGH SpectraExact 2500系列快速入门手册

SERVOTOUGH SpectraExact 2500系列快速入门手册

SERVOTOUGH SpectraExact 2500 产品手册

SERVOTOUGH SpectraExact 2500 产品手册



Selected solutions for propane-based applications

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 ammonia analyzer operating at peak performance. With state-of-the-art service centers around the globe, you’ll always have the support your process needs.

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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

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

Choose the experts in propane gas analysis

The Servomex difference is clear from the start, all the way through to delivery of an propane 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.

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