Low pressure flow calibration facility

ISO 17025-accredited low-pressure calibration of air and gas flow meters with traceable results across very small to very large flow ranges.

The low-pressure calibration facility supports manufacturers, utilities and industrial operators who depend on accurate air and gas flow measurement under atmospheric and pressurised conditions. The need arises when meters must be verified, controlled or recalibrated and when documented measurement performance is required.

When low-flow performance must be verified

Uncertainty in low-flow measurement or pressure influence can lead to incorrect billing, unstable process control and delays in approval or audit processes. The facility performs verification, control and recalibration of volume, mass and differential pressure meters, as well as related flow components. The outcome is documented calibration results that support regulatory documentation and contractual verification.

The facility is part of our expertise area Calibration and verification. We also offer air-calibration and high-pressure calibration of gas flow meters.

Test engineer inspects test setup in low pressure flow calibration facility. — Low pressure flow calibration facility offers verification, control and recalibration of volume, mass and differential pressure meters, as well as related flow components.

Target group and benefits

Traceable low-pressure calibration for compliant documentation and reliable operational decisions, supporting manufacturers, utilities, and measurement specialists.

We serve flow meter manufacturers, energy providers, HVAC specialists, calibration laboratories, and process industries that require precise low-pressure flow measurement. Calibration is typically required during product development, market approval, periodic verification, or investigation of performance deviations in operation. Where measurement uncertainty is not controlled or traceability cannot be demonstrated, organisations face compliance risks, contractual disputes, and reduced confidence in process data.

ISO 17025 calibration with traceability
Calibration under ISO 17025 provides documented uncertainty and recognised traceability, enabling customers to demonstrate measurement reliability in audits and regulatory reviews. Our facility supports calibration with air, nitrogen, CO₂, or helium, enabling results to align with application-specific requirements. Documented results are used to validate meter performance, confirm conformity with internal or external requirements, and support stable and transparent measurement practices across installations and markets.

Book an accredited low-pressure calibration

Arrange ISO 17025-accredited calibration of air and gas flow meters in the low-pressure facility. Calibration is available 24/7 by arrangement to support time-critical verification and documentation needs.

Use cases

Validate low-pressure air and gas flow meters and provide documented traceability.

Verification across wide low-pressure ranges

Confirm performance of mass, volume and differential pressure meters across low and high flow ranges to support verification and recalibration.

Detection of deviation from reference flow

Identify and document performance deviations caused by pressure, temperature or installation influences to support corrective action and recalibration planning.

Documentation for regulated measurement applications

Deliver calibration evidence for use in environments where accurate, traceable flow measurement is required.

Facility specifications

Atmospheric and pressurised calibration from 0.001 ln/min to 25,000 m³/h with defined uncertainty and traceability supporting compliance decisions.

Flow range 0.001 ln/min to 25,000 m³/h

Covers extremely low to very high flow rates, enabling calibration of small components, laboratory instruments and large industrial flow meters within one facility.

Pressure range atmospheric to 50 bar

Supports calibration under both atmospheric and pressurised conditions, allowing verification aligned with operational pressure environments.

Gases: air, nitrogen, CO₂, and helium

Enables calibration with multiple gases when application-specific media are required or when mass flow equivalence must be demonstrated.

Expanded uncertainty 0.16–0.34 %

Provides defined calibration uncertainty depending on flow range and gas type, supporting documented measurement capability.

Multiple independent calibration lines

Includes 4 lines for low-pressure calibration and atmospheric calibration benches for diaphragm and flow meter testing to ensure appropriate reference selection across small and medium flow ranges.

ISO 17025 accreditation and BIPM traceability

Calibration activities are accredited to ISO/IEC 17025 by DANAK Reg. No. 9 with traceability to international primary standards through BIPM.

Facility setup

Configure atmospheric or pressurised calibration conditions, and select suitable reference systems to match the meter type, flow range, and documentation needs.

Atmospheric and pressurised configurations

Supports calibration under atmospheric conditions and pressurised conditions depending on the calibration line, allowing test conditions to be aligned with the meter's intended operating environment and documentation requirements.

Gas selection for application needs

Calibration with air, nitrogen, CO₂, or helium, as needed, supporting cases where the intended operating gas differs or where conversion to an equivalent mass flow is required.

Reference system selection by flow regime

Allows selection between multiple independent calibration lines and atmospheric benches so the setup can match the relevant flow range and achieve the required uncertainty for the intended use.

Stable conditions for repeatable results

Applies controlled flow, pressure and temperature conditions at each calibration point to support repeatability and reduce uncertainty in results used for compliance and operational decisions.

Scheduling and operational availability

Calibrate at your convenience, with availability by arrangement, including 24/7 operation to support time-critical verification, investigation work, and documentation deadlines.

Standards

Operate under ISO/IEC 17025 accreditation by DANAK Reg. No. 9 with traceability to international primary standards through BIPM and participation in EuReGa.

ISO/IEC 17025 accreditation

The facility is accredited to ISO/IEC 17025 by DANAK under Reg. No. 9. Calibration activities are performed within the approved accreditation scope, and results are issued with documented measurement uncertainty.

DANAK Reg. No. 9

DANAK accreditation Reg. No. 9 defines the facility's recognised calibration scope and confirms that activities are performed under an accredited framework.

Traceability through BIPM

All working standards are traceable to international primary standards through BIPM, ensuring recognised measurement consistency and supporting international acceptance of calibration results.

EuReGa participation

The laboratory is part of EuReGa, the European Association of Gas Flow Calibration Laboratories, supporting cooperation and recognised competence within European gas flow calibration.

We test these types of meters:

Using atmospheric and pressurised air, the low-pressure facility supports first-time verification, control and recalibration of the following flow meter technologies:

• Volume meters
• Mass flow meters
• Differential pressure (DP) meters
• Orifice
• Vortex
• Venturi
• Turbine meters
• Swirl meters
• Coriolis meters
• Rotary meters
• Diaphragm meters
• Ultrasonic meters (USM)
The facility also provides verification and recalibration of related flow components and devices used in air and gas systems, including:
• Flow hoods
• Valves
• Nozzles
• Wet gas configurations
• Rota (V/A) meters
• Other equipment up to 12 inches in diameter

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Reach out to Thomas Boy Jacobsen for more information.

Low pressure calibration facility for air and gas meters

ISO 17025-accredited low-pressure calibration of air and gas flow meters with traceable results across very small to very large flow ranges.

When low-flow performance must be verified

Traceable low-pressure calibration for compliant documentation and reliable operational decisions, supporting manufacturers, utilities, and measurement specialists.

Book an accredited low-pressure calibration

Validate low-pressure air and gas flow meters and provide documented traceability.

Atmospheric and pressurised calibration from 0.001 ln/min to 25,000 m³/h with defined uncertainty and traceability supporting compliance decisions.

Configure atmospheric or pressurised calibration conditions, and select suitable reference systems to match the meter type, flow range, and documentation needs.

Operate under ISO/IEC 17025 accreditation by DANAK Reg. No. 9 with traceability to international primary standards through BIPM and participation in EuReGa.

We test these types of meters:

Flow meter technologies

Associated flow components

Related services and facilities

Related insights

Validate low-pressure air and gas flow meters and provide documented traceability.

Atmospheric and pressurised calibration from 0.001 ln/min to 25,000 m³/h with defined uncertainty and traceability supporting compliance decisions.

Configure atmospheric or pressurised calibration conditions, and select suitable reference systems to match the meter type, flow range, and documentation needs.

Operate under ISO/IEC 17025 accreditation by DANAK Reg. No. 9 with traceability to international primary standards through BIPM and participation in EuReGa.

Flow meter technologies

Associated flow components

Related services and facilities

Related insights