University of Twente Student Theses


Modelling and characterization of a relative permittivity sensor

Bloemert, J. (2019) Modelling and characterization of a relative permittivity sensor.

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Abstract:The relative permittivity is an important liquid property which can play a big role in determining the composition of liquid mixtures, for example in determining the quality of oil or the compositions of drugs delivered by intravenous therapy. Researchers of the University of Twente have build a fully integrated microfluidic measurement system, from which the relative permittivity sensor is a part.\cite{sensor_board} This paper focuses on the physical behaviour of this sensor when measuring with non-electrolytic en electrolytic liquids. In this paper impedance models are proposed from which the gain is analytically calculated and compared to measurements. The measurements show the potential of determining the liquid capacitance, and thus the relative permittivity, for both non-electrolytic and electrolytic liquids.
Item Type:Essay (Bachelor)
Faculty:EEMCS: Electrical Engineering, Mathematics and Computer Science
Subject:33 physics, 53 electrotechnology
Programme:Electrical Engineering BSc (56953)
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