Flow Meters for Hydrogen Filling Stations

Article Published: February 1, 2023 10:30 AM
Last Updated: September 30, 2025 11:18 AM
Written by: Jack Carr

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Hydrogen is gaining importance as an energy source for fuel cells.  However, fuelling of hydrogen is much more complex than fuelling of gasoline and diesel.  Unlike other gases, hydrogen heats up as it expands, causing pressure and temperature changes during fuelling that need to be precisely monitored.  In response, Kobold’s Heinrichs factory developed the TMU-W004 mass flow meter which ensures precise metering despite pressure and temperature fluctuations.

Certified to International Standard OIML R 139 2018

The device is the first of its kind certified to international standard OIML R 139 2018 and therefore approved for hydrogen filling stations.

The TMU-W004 is a robust instrument with a slender housing designed to protect the specially arranged sensors and measuring loops for the Coriolis effect and enable very precise flow measurement. The attached transducer converts the sensor signals into a reading that can be used to further analyse the flow rate. At the same time the meter measures the temperature of the medium. The TMU-W004 is suitable for high pressure applications up to 1000 BAR. This newly developed device is already in use at filling stations of the listed company Nel Hydrogen.

On the road to Climate-Friendlier Mobility 

The TMU-W product line was specially developed for hydrogen filling applications for dispensing stations. During the fuelling process, extremely high zero-point and long-term stability are required. Its special design provides the highest possible stability and unrivalled measuring accuracy to the end user. Special materials and sophisticated engineering design methods like FEM, CFD, FSI and others were used to fulfil this task.

For more information on this product, click here to view the product in more detail.

Meet the Author

Jack Carr

Technical Sales & Marketing Manager, Boiswood

Jack combines deep technical expertise with hands-on experience in pressure and flow control systems. With a strong focus on real-world applications, he works closely with customers to understand their challenges and deliver fit-for-purpose solutions. His practical approach and in-depth product knowledge ensure every recommendation is accurate, efficient, and built around performance.

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