The compact GH2+ system series was developed to measure and track highly compressed hydrogen transported in trailer vehicles. The metering system stands out from competing solutions through temperature-independent mass flow measurement and guarantees, thanks to certification in accordance with applicable national and international metrology standards, high accuracy and safe system operation.
GH2 HUB – The Solution for Stationary H2 Measurement
The GH2 Hub from TrigasDM is a stationary, fiscal metering flow measurement system for gaseous hydrogen, designed for unloading hydrogen trailers at stationary receiving points. The system enables precise and legally compliant recording of the delivered H₂ volumes – regardless of fluctuating flow rates.
GH2 Hub thus provides the legal basis for billing stationary hydrogen refueling in industrial applications.
GH2 HUB: Precise Billing Directly at the Point of Use
When the MEGC is used as a mobile storage unit at the customer site, GH2 HUB offers decisive advantages through direct mass measurement compared to conventional pressure and temperature methods (P/T measurement):
Independence from Thermodynamics (Joule-Thomson Effect)
➡️ During hydrogen withdrawal from the MEGC, the gas temperature changes dynamically throughout the extraction process. Since pressure and temperature are constantly changing, P/T calculations are often inaccurate. In addition, real gas conditions, compressibility factors (Z-factors), and precise vessel data must be taken into account in the P/T method.
✅ GH2 HUB measures the actual mass of the flowing molecules. The extreme temperature fluctuations within the vessel have no impact on billing accuracy.
“Pay-per-Use” Instead of Flat-Rate Billing
➡️ Customers often withdraw hydrogen based on demand over an extended period of time.
✅ The GH2 HUB advantage: Every gram withdrawn is measured precisely, just like at a fuel dispenser. This enables real-time consumption-based billing, preserves customer liquidity, and automates your invoicing process.
No Disputes About Residual Quantities
➡️ An MEGC is rarely emptied completely to 0 bar. With P/T measurements, the remaining residual pressure often leads to disagreements about how much gas was actually delivered.
✅ The GH2 HUB advantage: Only the quantity that passes through the customer interface is billed. Whatever remains in the trailer is irrelevant for invoicing. This creates 100% transparency and trust.
Real-Time Data Without Waiting Times
➡️ P/T measurements often require “settling times” so the gas temperature can stabilize for accurate measurement.
✅ The GH2 HUB advantage: Measurement takes place directly in the flow. The customer immediately sees how much has been consumed, and you know in real time when the MEGC is empty and needs to be replaced (optimized logistics planning).
Legal Certainty for Transfer of Ownership
➡️ As soon as the hydrogen flows from the trailer into the customer’s system, a commercial transaction takes place.
✅ The GH2 HUB advantage: As a metrologically approved system, GH2 HUB provides officially recognized measurement values. This is the only valid basis for legally compliant invoicing in commercial transactions.
Operators of hydrogen trailer refueling stations face several key challenges:
Hydrogen trailer refueling stations require precise and fiscal metering volume measurement to ensure legally compliant billing. At the same time, fluctuating pressure and flow conditions during trailer operation place high demands on measurement stability. Operators also need highly available, integratable, and future-proof measurement systems that can be flexibly integrated into existing facilities.
GH2 HUB – The Solution for Fiscal Metering Hydrogen Measurement at Trailer Exchange Stations
The GH2 HUB is a stationary, fiscal metering flow measurement system designed specifically for hydrogen trailer refueling stations. The system delivers reliable measurement results even during load changes, can be integrated in a modular fashion, and supports legally compliant, transparent billing. Thanks to its robust and scalable design, the GH2 HUB offers a future-proof solution for long-term operation.
Your benefits at a glance
- Fiscal metering flow measurement for gaseous hydrogen
- Ideal for hydrogen refueling stations
- Legally compliant billing in accordance with MID and national calibration requirements
- Modular system for easy integration
- High measurement accuracy across varying operating pressures
Typical applications
- Trailer exchange stations (swap stations)
- Decentralized hydrogen refueling stations
- Industrial hydrogen users with variable consumption volumes
- Operators of hydrogen vehicle fleets (buses, trucks, trains)
- Hydrogen distribution networks in the development phase
“Every trailer exchange station has different unloading profiles. We assess your specific operating conditions and configure your GH2 hub accordingly – with sensor selection and optimization all from a single source. We don’t leave until your solution is working perfectly.”
Get in touch with us. We are looking forward to hearing from you.
Find more interesting products for hydrogen measurement here
Our RMS Hydrogen Reference Measurement System makes it possible to conduct a complete metrological inspection, for example, of a hydrogen refueling station, within a few hours. The measurement results from our RMS serve as the basis for the metrological inspection of the facility or for acceptance testing. The measurement system is characterized by its compact size and can be easily transported in a passenger car. A measurement campaign can thus be carried out by a single person in approximately 3 or 4 hours.
The GH2 Hub from TrigasDM® is a stationary, fiscal metering flow measurement system for gaseous hydrogen, designed for unloading hydrogen trailers at stationary receiving points and trailer exchange stations. The system enables precise and legally compliant recording of the delivered H₂ volumes—regardless of fluctuating flow rates. GH2 Hub thus provides the legal basis for billing stationary hydrogen refueling in industrial applications.
GH2 Source was developed to measure high-density hydrogen at the source’s delivery point for filling trailers. The flow measurement system stands out from competing systems thanks to its temperature-independent mass flow measurement and, thanks to its certification in accordance with the Measurement and Calibration Ordinance, guarantees legally compliant billing, high accuracy, and safe operation of the system.
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