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Theory and modeling of eddy current type inductive conductivity sensors
Citation Link: https://doi.org/10.15480/882.3715
Publikationstyp
Journal Article
Date Issued
2021-05-17
Sprache
English
Author(s)
Harms, Julius
Institut
TORE-DOI
Journal
Volume
6
Issue
1
Article Number
37
Citation
Engineering Proceedings 6 (1): 37 (2021)
Contribution to Conference
Publisher DOI
Scopus ID
Publisher
Molecular Diversity Preservation International
Peer Reviewed
true
While transformer-type conductivity sensors are the usual type of inductive sensors, this paper describes the theory behind less used eddy current sensors. This type of sensor measures the conductivity of a liquid by inducing eddy currents and observing the effect on the sensor coil, which allows a simpler sensor design and promises a cost advantage in implementation. A novel model description is derived from the Maxwell equations and implemented by an equivalent RLC circuit. The designed model is validated by comparisons with experimental observations and FEM simulations. The result leads to a better understanding of the physical effects of the sensor and the influencing parameters for future sensor developments. The aim is to provide starting points for further sensor development of low-cost inductive conductivity sensors.
Subjects
salinity
conductivity
inductive
eddy current
sensor
model
DDC Class
600: Technik
620: Ingenieurwissenschaften
Publication version
publishedVersion
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engproc-06-00037 (1).pdf
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