Endress + Hauser Flowtec Ag

Andreas Güttler

Hao Zhu

Alfred Rieder

Wolfgang Drahm

Yaoying Lin

A method for characterizing the gas load of a medium, which comprises a liquid loaded with gas, using a measurement sensor that guides the medium in at least one vibrating measurement tube, includes: determining a speed of sound value and a resonator density value of the medium based on natural frequencies of at least two different vibration modes of the measurement tube; determining a measured pressure value for the medium guided in the measurement tube; determining a gas volume content of suspended bubbles in the medium based on the resonator density value, the speed of sound value and the measured pressure value; and determining a value for the gas volume content of free bubbles based on the resonator density value of the medium and the gas volume content of suspended bubbles.

Method for characterizing the gas load of a medium, and density meter therefor

An arrangement includes a pipeline and a Coriolis volumetric flow meter for measuring a mass flow rate of a medium flowing through the pipeline. A first pressure sensor is attached at an inlet-side of the pipeline and a second pressure sensor is attached at an outlet-side of the pipeline, or wherein a differential pressure sensor is configured to detect a difference between an inlet-side and an outlet-side. The pressure sensors and/or the differential pressure sensor are configured to measure a media pressure and to determine, for each differential pressure, a volumetric flow velocity of the medium through the pipeline. A first monitoring sensor is attached at an inlet-side portion of the pipeline and a second monitoring sensor is attached at an outlet-side portion of the pipeline, wherein the monitoring sensors are configured to monitor a measurement variable different from the media pressure to identify a static media state.

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Zolling, Germany

Andreas Güttler