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Endress+Hauser Ensures Maximum Accuracy in the Oil Industry

4 Jan 2020  |
Coriolis flowmeters from Endress+Hauser enable precise billing of hydrocarbons in custody transfer over 90 million barrels a day of crude oil, natural gas and refined hydrocarbons are produced, transported, stored and sold to end customers.

Each custody transfer measuring system is a kind of cash register. Any measurement inaccuracy will therefore result in enormous shortfalls for the supplier or buyer. Endress+Hauser supports its customers not only with high-quality Coriolis flowmeters, but also by constructing custody transfer measuring systems and with a hydrocarbon flow calibration rig.


  • Many years of experience in consulting and in engineering of custody transfer measuring systems
  • High-precision and robust Coriolis flow measuring technology – optimized for your application
  • Traceable and accredited hightech calibration rigs – even for high-viscosity hydrocarbons
  • Worldwide service network for support of custody transfer measuring points over the entire life cycle

Although the properties of liquid hydrocarbons vary greatly and thus can affect accuracy, Endress+Hauser Coriolis flowmeters have proven to be the best current method for measuring these viscous fluids reliably. Promass sensors are resistant to process fluctuations, vibrations and external pipe load stress. Endress+Hauser offers four devices: Promass F for universal use, Promass Q for challenging fluids, Promass X for maximum flow rates (4100 t/h) and Promass O for high process pressures.

Conforms to OIML / API thanks to Reynolds number correction

Each flow measuring technology features a measuring error depending, for example, on the velocity, density or viscosity of a fluid. These influences can be described by the Reynolds number. Endress+Hauser has developed a patented method for Reynolds number correction that is integrated into each Promass Coriolis flowmeter. Users can therefore be assured that the requirements from the OIML R117 guideline (MPE: ±0.2%) will be observed without the need to calibrate flowmeters with oil beforehand.

Customer-specific calibration with hydrocarbons

Due to national laws or international standards (OIML R117, API, etc.), it is common practice in the oil industry for custody transfer measuring systems to be verified on site using a reference. Such verifications are sometimes complex, costly or impractical. Therefore, customers often request an pre-calibration with hydrocarbons. Endress+Hauser is one of the few flowmeter manufacturers to offer such factory calibrations on a traceable rig accredited by the Swiss Accreditation Service (SAS).

Experience in building custody transfer measuring systems

Endress+Hauser plans and constructs customized measuring systems for custody transfer. All involved partners are ISO 9001-certified and are audited on a regular basis. In addition to the construction of stationary and mobile measuring systems, the range of services offered by Endress+Hauser also includes on-site consultations, coordination with metrology and/or calibration authorities, commissioning, on-site test measurements and assistance with acceptance and approval by customs authorities.

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Endress+Hauser is a global leader in measurement and automation technology for process and laboratory applications. The family company, headquartered in Reinach, Switzerland, achieved net sales in 2022 of approximately 3.3 billion euros in net sales...

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