- Flow range: approx. 65–25,000 m³/h
- Pressure: atmospheric (0–8 bar for selected tests)
- Uncertainty: typically ≈0.23% (Uₑₓ, 95%)
- Meter sizes: up to 50"
Calibration and verification
Calibration of gas flow meters
Verify flow meter performance under true field conditions using natural gas, air or other gases for traceable, reliable results.
Accredited calibration of gas, air and other gaseous flow meters ensures measurement validity under conditions that reflect real operation. Calibrations are performed under controlled pressure and flow conditions using reference systems designed to reproduce relevant operating behaviour. The outcome is traceable results and dependable data for custody transfer, process control and meter development.
Reduce flow uncertainty
Flow meter manufacturers, utilities, and operators responsible for gas measurement systems often struggle with high flow uncertainty, differences between calibration conditions and real operating pressure, and meter behaviour that changes when pressures, gas types or installation conditions differ from the test setup. These gaps can lead to settlement disagreements, process deviations, and compliance issues in custody-transfer applications. The service is part of our expertise area Calibration and verification.
Challenges
Measurement challenges in high-pressure gas flow metering for custody transfer
High measurement uncertainty in custody transfer
Small deviations in gas flow measurement can result in significant financial discrepancies between contracting parties. If uncertainty remains unresolved, it increases the risk of settlement disputes, revenue loss and reduced confidence in metering systems.
Performance shifts under real operating pressure
Flow meters calibrated only at atmospheric conditions may behave differently at high pressure or with different gas compositions. This can lead to undetected systematic errors and unreliable data in operational environments.
Drift between calibration intervals
Over time, wear, contamination or process conditions can affect meter accuracy. Without verified performance data, operators risk gradual loss of measurement reliability and non-compliance with contractual or regulatory requirements.
Lack of traceable documentation for audits
Inadequate or non-accredited calibration documentation can create challenges during audits and regulatory reviews. Missing traceability to recognised standards may delay approvals or compromise acceptance of measurement results.
Benefits
Accredited calibration that ensures low uncertainty and full traceability
Traceable results across all pressure ranges
Accredited calibration under both atmospheric and high-pressure conditions provides full traceability to national and international standards, ensuring dependable results for gas and air flowmeters.
Realistic performance verification
Calibrations are carried out under conditions that reflect actual operating behaviour, helping reduce measurement deviations and safeguarding custody-transfer and process data.
Flexible access across multiple facilities
High- and low-pressure calibration facilities operate year-round, allowing customers to plan calibrations around production schedules and minimise downtime.
