Union Instruments

Precise Gas Monitoring and Calorimetry for Industry and Energy

Giving you reliable insight into complex gas streams

In industrial energy production, biogas upgrading, process combustion control and natural gas quality management, having dependable gas analytics and gas quality data is essential for efficiency, safety and compliance.

Union Instruments has nearly a century of experience in high-performance measurement technology, delivering accurate, robust solutions that meet real-world needs in demanding environments.

With a global installed base and products designed for flexibility and long-term operation, Union Instruments helps you measure and understand gas composition, calorific value and combustion characteristics — so you can optimize performance, reduce risk and support regulatory compliance.

About Union Instruments

Founded as a specialist in gas analysis and monitoring technology, Union Instruments GmbH combines innovation with precision engineering. Its modular and configurable analyzer systems support a wide range of applications, from biogas and natural gas analysis to combustion calorimetry and industrial emissions tracking — with thousands of analyzers operating worldwide.

The product portfolio includes two core gas analysis and quality measurement families that serve your operation’s biggest challenges.

Multi-Gasanalyzers INCA – Custom Configurable Gas Analysis

Modular, scalable and tailored to your gas composition needs

Union’s INCA series of multi-gasanalyzers provides a highly flexible platform for multi-component gas analysis — ideal for biogas, natural gas, syngas or by-gas applications where compositions vary and accurate, real-time insight matters.

Rather than offering a one-size-fits-all analyzer, INCA’s modular design lets you build a custom solution based on:

Sample gas supply modules
Gas conditioning and processing stages
Sensor modules tailored for specific components
Control and data processing units

This approach ensures your analyzer is optimized for your specific use case — from basic indoor installations with a few measurement points to outdoor or hazardous areas with extended capacity and optional gas coolers.

Key advantages for you:

Modular scalability – add or change sensor modules as needs evolve
Tailored performance – custom configuration cuts down cost and complexity
Reliable operation – designed for industrial environments with condensate handling options
Broad applicability – from biogas plant control to palm oil mill monitoring

Common configurations include:

INCA1000 and INCA3000 (indoor systems)
INCA4000 series (with gas cooler)
INCA5000 / INCA6000 (outdoor capable)

Calorimeter CWD – Direct Gas Quality and Calorific Value Monitoring

Know your gas quality by measuring what really counts

For combustion control, energy efficiency and fuel gas quality assessment, Union’s Calorimeter CWD series provides continuous determination of gas Wobbe Index, specific density and calorific values — the parameters that directly influence how a fuel behaves in combustion systems.

The CWD systems operate by directly measuring the Wobbe Index and specific gravity of the gas and calculating heating value and combustion value from those measurements. This makes them especially valuable in environments where gas composition can change rapidly:

Natural and low-calorific gases
Biogas and industrial gas blends
Turbine feed gases
Boiler and furnace fuel supply lines

Versions of CWD systems include models for standard, high-calorific gases and even ATEX-certified combustion calorimeters suited for explosive atmospheres.

What this means for you:

Accurate, continuous gas quality monitoring
Direct measurement of combustion characteristics
Support for process optimization and fuel efficiency
Reliable data for energy billing, combustion control, and emissions reporting

Who Benefits from Union Instruments

Union Instruments products are designed for professionals who rely on accurate gas quality and composition data to manage daily operations and long-term outcomes:

Biogas & Renewable Energy

Understand methane content, trace constituents and gas quality to optimize production and upgrading.

Natural & Syngas Applications

Monitor complex gas blends and ensure consistent fuel quality for combustion or pipeline injection.

Process & Combustion Control

Accurate calorific value and component analysis helps improve system efficiency and reduce fuel costs.

Industrial Compliance & Safety

Real-time analytics support regulatory reporting, flare management and critical process monitoring.

Trusted Local Support

At Norsk Analyse, we combine Union Instruments’ global technology leadership with local service and support. We assist you with:

Choosing the right analyzer configuration
Installation and commissioning
Training, calibration and long-term maintenance

Want to know more about our solutions from Union Instruments?

Find your local contacts

Products in the Union Instrument Portfolio

INCA Multi-Gas Analyzers

Union Instruments INCA analyzers provide modular, customizable multi-gas measurement solutions for biogas, natural gas and industrial processes.

Find out how the INCA analyzers meet your needs

CWD Calorimeter Series

Union Instruments CWD calorimeters deliver real-time Wobbe Index, density and calorific value measurements for gas quality control and process optimization.

Find out how the CWD Calorimeter Series meet your needs