Surveillance audit successfully passed – DAkkS confirms accreditation according to DIN EN ISO/IEC 17025:2018

TrigasFI GmbH has successfully passed this year’s surveillance audit conducted by the German Accreditation Body (DAkkS). The company’s accreditation according to DIN EN ISO/IEC 17025:2018 has been reconfirmed.

DIN EN ISO/IEC 17025:2018 is the internationally recognized standard for testing and calibration laboratories. It specifies requirements for technical competence and ensures that calibration and test results are reliable, traceable, and internationally comparable.

During the surveillance audit, DAkkS assessed key aspects of our laboratory operations, including technical competence, traceability of measurements to national and international standards, and compliance with validated calibration procedures. The evaluation also covered staff qualifications, the condition and suitability of measuring equipment, and the completeness and integrity of technical records.

The positive outcome confirms that TrigasFI continues to fully comply with the requirements of DIN EN ISO/IEC 17025:2018 and delivers calibration services at an internationally recognized level of quality and competence.

For our customers, this provides assurance of accuracy, traceability, and reliability in all calibration results.

We sincerely thank our team for their continued dedication and professional excellence, which made this achievement possible.

Hyvolution 2026: Hydrogen measurement technology for the future

TrigasDM and TrigasFI are demonstrating at Europe’s largest hydrogen trade fair. Precision under extreme conditions is no coincidence.

Hyvolution 2026 in Paris was a complete success for us. From January 27 to 29, we presented our latest solutions for hydrogen measurement technology at booth N23 – and the feedback from the industry was unmistakable: the demand for calibratable, high-precision measurement systems is exploding.

New markets, new requirements!

We were particularly pleased that industries we had not previously focused on showed great interest. The energy industry and heavy-duty transport have recognised that hydrogen infrastructure cannot function without reliable measurement. From gas stations to supply networks and filling stations, wherever H2 is handled, the same question arises: How can I measure accurately and in compliance with calibration requirements?

The answer lies in our hydrogen measurement systems for on-site calibration and our GH2 flow measurement systems for extreme pressures and temperatures.

Workshop with scientific depth

On 28 January, Mr Raphael Michael, Development Engineer at TrigasDM GmbH, gave a presentation as part of a workshop.

He presented what we have been working on for years: “Accuracy Under Pressure: Practical Calibration Techniques of Coriolis Flow Meters for Hydrogen Applications”. Based on five years of calibration data from our partner TrigasFI, we presented practical calibration methods for extreme conditions.

     up to 875 bar pressure
     up to -40 °C temperature
     0,7–1,1% accuracy (vs. >2% using standard methods)

This is not theoretical knowledge – it is proven practice from our accredited laboratory.

International demand is growing.

Another clear trend is the rapid growth in demand for calibratable systems. Hydrogen is a global commodity, and wherever H₂ is traded, reliable measurement technology is required. TrigasFI gives us a decisive advantage here: we are one of the few companies in Europe with an ISO 17025-accredited high-pressure gas calibration facility, which makes all the difference.

What does this mean for you?

Whether you work in the energy sector, logistics, research, or industry: the hydrogen revolution has shown that accuracy, safety, and reliability are no longer optional features – they are basic requirements for anyone who wants to be successful in the hydrogen economy.

We are ready to support you in this endeavor.

Are you interested in calibratable hydrogen measurement systems? Contact us—we will advise you on your individual application.

Get in touch with us. We are looking forward to hearing from you.

Successful trade fair appearance at Hydrogen Technology Expo Europe 2025 in Hamburg

Working together for precision and progress in hydrogen technologye

Hydrogen Technology Expo Europe in Hamburg was a complete success for us – three days full of innovation, intensive discussions, and impressive insights into the future of the hydrogen economy. As TrigasDM, we were once again able to demonstrate why we are one of the leading partners in flow measurement technology and calibration solutions – especially when it comes to hydrogen.

In Hall 6, Booth 6A45, we presented how precision, reliability, and safety go hand in hand when it comes to the development and application of state-of-the-art hydrogen technologies. Our solutions are an integral part of numerous H₂ applications – from production and storage to distribution.

TrigasFI demonstrated how precise calibration and testing expertise form the basis for quality and efficiency. With our in-depth expertise in hydrogen calibration, we set standards in an industry where every detail counts.

For us, the trade fair was more than just a platform – it was a place for exchange, inspiration, and confirmation that, together with our partners, we are making a decisive contribution to establishing hydrogen as the energy source of the future.

A big thank you to everyone who visited us, asked questions, and shared ideas. We are taking a lot of inspiration with us – and are already looking forward to the next steps in advancing hydrogen technology.

Review of MEORGA MSR in Landshut

On October 14, 2025, TrigasDM was represented at the MEORGA MSR trade fair in Landshut. Together with our partner SINOPES, we welcomed numerous interested trade visitors to our booth.

With a focus on innovative solutions and precise flow measurement systems, we took the opportunity to showcase our expertise and technologies in the field of measurement and control technology for gases and liquids.

The trade fair provided the ideal setting for technical discussions and valuable networking with industry experts. We were delighted to give visitors practical insights into the performance of our calibration systems and high-precision flow meters and to advise them on individual application possibilities in various industrial sectors.

We would like to express our sincere thanks to everyone who visited our booth and contributed to a successful event. The exciting discussions and constructive feedback encourage us to continue developing innovative and reliable solutions for the challenges of flow measurement.

Stay tuned for our upcoming events and new products!

TrigasFI successfully re-certified according to ISO 9001

TrigasFI GmbH has successfully passed the ISO 9001 re-certification.
The independent audit confirms that our quality management in the calibration and assembly of flow meters complies with international standards.

This enables us to guarantee our customers:

reliable calibration results
maximum precision in assembly
structured processes for consistent quality.

For us, this re-certification is not only an important milestone, but also a clear promise: we stand for precision, reliability, and continuous improvement in all areas.

Critical Venturi vs. Bell Prover - A Comparison of Gas Flow Calibration Technologies

When it comes to calibrating gas flow with precision, there are often two systems to choose from: the Bell Prover, which is the primary standard, or high-performance Sonic Nozzle Test Benches. In our latest article, we highlight the key differences between the two systems and explain why Sonic Nozzles are the smarter choice for many industrial applications today.

Gas flow calibration is evolving: While the Bell Prover remains a primary standard, Critical Venturi or Sonic Nozzle technology is increasingly dominating industrial applications. Offering continuous, pressure-independent calibration with minimal maintenance and an impressive turndown ratio of up to 4,000:1, Sonic Nozzles outperform traditional systems in flexibility and cost-efficiency. Despite the lack of primary standard status, critical nozzles achieve comparable measurement accuracy through precise calibration traceable to primary standards and high long-term stability.

For modern, cost-conscious calibration processes, Sonic Nozzles provide an efficient and future-proof alternative—unless regulations explicitly require a primary standard.

Successful Summer Party 2025 – Sunshine, Good Vibes and BBQ!

On Wednesday, July 23, 2025, it was time once again: TrigasDM and TrigasFI came together to celebrate their annual summer party and it was a great success!

In perfect summer weather and a relaxed atmosphere, colleagues gathered in the afternoon at the Pulling sports restaurant “Zum Loki.” Delicious food and drinks were plentiful: fresh salads, crusty bread and cold drinks were ready and the grilled food came hot off the barbecue.

A special highlight was the wide variety of desserts: from cakes and puddings to fruit salads, there was something sweet for everyone. The evening was filled with laughter, conversations, great food, and a wonderfully laid-back summer vibe.

A heartfelt thank-you to everyone who helped, contributed or simply joined with a smile. We’re already looking forward to next year!

Evaluation of Practical Calibration Techniques for Coriolis Flowmeters in High-Pressure Hydrogen Applications

The growing adoption of hydrogen as a clean energy carrier, particularly in fuel cell vehicle infrastructure, has increased the need for accurate mass flow measurement under high-pressure conditions. Coriolis flowmeters are widely used in these applications due to their direct mass flow measurement capabilities. However, challenges arise when calibrating these meters for hydrogen service, owing to hydrogen’s low density, high compressibility, and operational conditions that differ significantly from standard calibration environments.

This study analyzes the limitations of traditional calibration methods—including water and low-pressure air—against the requirements of hydrogen service at pressures up to 875 bar and temperatures down to -40 °C. Using five years of calibration data from the ISO 17025 accredited TrigasFI GmbH flow calibration lab, the performance of Coriolis meters calibrated with pressurized air at matched hydrogen densities was evaluated and compared with manufacturer-supplied water calibration data. The findings confirm that density-matched air calibration significantly reduces tolerance-induced errors, achieving total uncertainties as low as 0.7–1.1%, compared to >2% for water and up to 1.7% for low-pressure air calibrations.

Additionally, the study investigates drift over time, manufacturing tolerances, and dynamic response errors that impact performance under hydrogen-like conditions. Recommendations are provided for optimal calibration procedures and recalibration intervals to ensure reliable custody transfer measurements in hydrogen distribution networks. The results support matched-density air calibration as a practical and accurate surrogate to gravimetric hydrogen calibration, offering a cost-effective approach without compromising metrological integrity.

On 2 July 2025, we received a special visit

A delegation from Slovenia stopped by as part of the “Bavaria - Fit for Partnership” programme - with a lot of interest, exciting questions and genuine interest in possible collaborations

The delegation visit, organized by the Bavarian State Ministry of Economic Affairs, Regional Development and Energy, brought 14 representatives from the Slovenian aerospace industry to Bavaria – and directly to our company.

After a warm welcome, we started with a company presentation, followed by a tour of our liquid and gas laboratory. This was not just about facts and figures – but also about concrete application examples, hands-on technologies and personal interaction.

The discussions quickly revealed that there are exciting interfaces and genuine approaches for collaboration – whether in the field of hydrogen, research & development or technical solutions.

💬 “It was great to see how open, interested and technically strong the delegation was. The exchange was valuable for both sides – and perhaps the start of more,” said one member of our team after the visit.

We would like to thank everyone for their interest, the good atmosphere and the valuable dialog – and look forward to what may come of it!

New Energy Sources - Oktoberfest in Billing?

Hydrogen is among the energy sources of the future and is increasingly being adopted as a low-emission alternative. Good for people and the environment! But is it also good for our wallets? In many areas, the billing of this advanced energy variant still uses methods that are not up to date.

Recently, we have access to advanced metering technology with professional transmission methods. However, many places still use billing methods that can be considered rudimentary in unfavorable cases.

Similar to the famous German “Oktoberfest,” where an eager bartender might tap 110 liters from a 100-liter beer keg in the hustle of the world’s largest folk festival.

But what about customers buying hydrogen as an energy source today?

The conventional measurement methods using differential pressure are unreliable because they depend heavily on environmental conditions. In this method, the pressure in the hydrogen tank is measured before and after dispensing, and the delivered amount is calculated from the pressure difference.

The measurement becomes even more inaccurate when environmental conditions change. When temperatures rise, hydrogen expands, and the pressure in the tank increases. This often results in a delivery truck that starts in the cool morning and delivers in the midday heat possibly selling more than it loaded.

The reverse is also possible. If temperatures drop, it may deliver more to the customer than it bills for.

It’s a bit like the beer mugs at Oktoberfest, except that the reference is unintentionally altered by external conditions.

The Solution Already Exists

All of this can be solved much better today. There are now excellent measurement methods that can measure hydrogen very accurately, regardless of external conditions. This does not mean that the measurement is simple. The high pressures of gaseous hydrogen, up to 800 bar, and the demanding conditions exclude many measurement systems. However, there are suitable solutions on the market.

But like the bartenders at Oktoberfest, intervention by authorities is needed here, serving as a neutral body concerned with the well-being of both suppliers and customers.

The delivery of fossil fuels and the billing of solar and wind power have long been regulated. This regulation is now also pending for hydrogen delivery.

In Germany, authorities have already reacted. According to the new Calibration Law (MessEG), delivery vehicles that distribute and bill hydrogen must have approved and calibrated measurements with prescribed accuracy on board. These must be recalibrated every two years.

German hydrogen suppliers are pioneering this effort!

For gas suppliers, this initially posed the problem of finding a suitable solution that had to be approved for this application. Trigas DM, a specialist in flow measurements and calibration, and a well-known gas supplier from Germany developed a pioneering solution, which was approved by the PTB, the national institute in Germany, after thorough testing in October 2019.

This solution not only covered technical requirements and prescribed logging but also solved another problem causing headaches for gas suppliers. The biennial calibrations of measuring devices would have meant an immense additional effort. As the measuring units were to be installed on the trucks, it would have meant that all vehicles would have had to visit the calibration office for one to two days every two years.

With about 300 measuring systems delivered by Trigas DM so far, this would have created a massive logistical effort for gas suppliers. For hydrogen suppliers, this would have meant their trucks were out of service during this time, resulting in significant financial losses.

Find more information on the TrigasDM website.

Trigas DM’s solution makes both unnecessary. The measuring system was designed as a removable unit. When calibration is due for a truck with a Trigas measuring system, it doesn’t need to schedule a cumbersome appointment with the calibration office but simply drives to one of Trigas’ certified workshops. This usually happens as part of regular maintenance, so no additional effort is required.

In the workshop, the measuring unit is exchanged by qualified personnel for a freshly calibrated unit, previously requested from Trigas. The “old” box is sent back to Trigas.

The returned boxes are collected in the accredited flow laboratory of TrigasFI. When a certain number of units are ready for calibration, Trigas schedules the appointment with the calibration officer. When the officer visits, the measuring units are calibrated and certified under ISO 19025 supervision. The calibration officer can then certify a series of systems at once, saving time and costs, and relieving the customer of organizing the calibration.

This means hydrogen delivery to customers can now occur with reliable accuracy at any time, without gas suppliers fearing additional downtime of their trucks or immense regulatory calibration efforts. Here will find more information to our logistic concept.

The hydrogen delivery in Germany has now reached the reliably regulated energy supplies

TrigasDM GmbH®, as a manufacturer of highly accurate flow measurements, is a specialist in hydrogen measurements. The sister company TrigasFI GmbH®, as an accredited calibration laboratory for the flow of liquids and gases, handles high-quality calibrations even under challenging conditions. Do you have questions about calibratable hydrogen measurements or seek calibration options? The engineers at Trigas are happy to assist you.

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