One partner for complete gas measurement
From component to certified system.
Every link in the gas measurement chain sits inside our group, from micron-tolerance precision components, through ultrasonic, rotary and turbine meters, to fully assembled custody transfer skids and ISO 17025 calibration.
Click any stage to meet the specialist company behind it.
Six specialists. One group.
Each company brings deep domain expertise. Together they cover the full gas measurement chain.
Transus Instruments
Mechatest
Strategic participations
Our dealers & partners worldwide
From our headquarters in Belgium and the Netherlands, GMG operates through a global network of dealers and sales partners.
Why work with the group?
End-to-end accountability
One group owns the full chain, no finger-pointing between suppliers on complex projects.
Certified measurement accuracy
Certified accuracy where it matters, NMi-approved products meeting OIML R137, EN 12480, EN 12261 and ISO 17089 standards.
In-house manufacturing
Every component manufactured, assembled and validated within the group, in Belgium and the Netherlands.
Future-proof for energy transition
Hydrogen-certified products, LNG metering capability and CO₂ custody transfer measurement for carbon capture, ready for the evolving energy grid.
Carbon capture & energy transition
Precision measurement for CO₂, hydrogen and the low-carbon gas grid.
GMG delivers fiscal-grade measurement for the full carbon capture, transport and storage (CCS) chain, alongside hydrogen-certified meters and biogas solutions. We help operators measure, account for and optimise the gases that power the energy transition.
Selected from our portfolio

New true zero-D ultrasonic meter for gas distribution networks, no straight pipe required, patented Broadband CW technology.
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Fiscal-grade metering systems for CO₂ transport, injection and storage, supporting carbon capture (CCS) projects across Europe.
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Rotary meter for distribution & industrial measurement, H₂-certified variants available.
View productWorking on a gas metering project?
Our engineers can help you select the right measurement solution, from a single meter to a complete turnkey system.

