title: An acoustic transmission sensor for the longitudinal viscosity of fluids.
abstract: Physical fluid parameters like viscosity, mass density and sound velocity can be determined utilizing ultrasonic sensors. We introduce the concept of a recently devised transmission based sensor utilizing pressure waves to determine the longitudinal viscosity, bulk viscosity, and second coefficient of viscosity of a sample fluid in a test chamber. A model is presented which allows determining these parameters from measurement values by means of a fit. The setup is particularly suited for liquids featuring higher viscosities for which measurement data are scarcely available to date. The setup can also be used to estimate the sound velocity in a simple manner from the phase of the transfer function.
authors.affiliation: Institute for Microelectronics and Microsensors, Johannes Kepler University Linz, Altenberger Str. 69, A-4040 Linz, Austria.
authors.forename: Hannes
authors.initials: H
authors.lastname: Antlinger
authors.affiliation: Institute for Microelectronics and Microsensors, Johannes Kepler University Linz, Altenberger Str. 69, A-4040 Linz, Austria.
authors.forename: Stefan
authors.initials: S
authors.lastname: Clara
authors.affiliation: Institute for Integrated Sensor Systems, Austrian Academy of Sciences, Viktor Kaplan Strasse 2, 2700 Wiener Neustadt, Austria.
authors.forename: Roman
authors.initials: R
authors.lastname: Beigelbeck
authors.affiliation: Institute of Sensor and Actuator Systems, Vienna University of Technology, Gusshausstrasse 27-29, 1040 Vienna, Austria.
authors.forename: Samir
authors.initials: S
authors.lastname: Cerimovic
authors.affiliation: Institute of Sensor and Actuator Systems, Vienna University of Technology, Gusshausstrasse 27-29, 1040 Vienna, Austria.
authors.forename: Franz
authors.initials: F
authors.lastname: Keplinger
authors.affiliation: Institute for Microelectronics and Microsensors, Johannes Kepler University Linz, Altenberger Str. 69, A-4040 Linz, Austria.
authors.forename: Bernhard
authors.initials: B
authors.lastname: Jakoby
keywords: Liquid condition monitoring; Physical fluid properties; Pressure waves; Second coefficient of viscosity; Ultrasonic sensors; Viscosity sensors
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