PROCESSING FUNCTION OF EDDY-CURRENT INDUCTIVE TRANSDUCER IN AN IMMERSION VERSION FOR THE CONDUCTIVITY MEASUREMENTS OF CHEMICAL MEDIA

Józef Kusmierz

Abstract

This paper contains the processing formula of an inductive transducer in an immersion version for contactless measurements of conductivity of conductive media. In this version, a winding has been wound round an insulating stick in the form of a short coil. Such a construction enables us to easily place the transducer in the investigated medium. Dependencies determining the influence of the electric and magnetic properties of the walls of the vessel, which contains the investigated medium upon the transfer function of the transducer have also been formulated. These dependencies can also be used to designing the transducer in a shield with aforementioned properties. Moreover, experiments have been carried out which consisted in the measurement of the conductivity of the H₂SO₄ electrolyte solutions of known concentrations in a constant temperature by means of the transducer designed and using the theoretical dependencies derived. The results obtained demonstrate that the measurements – by means of the proposed methodology – can be carried out with a sufficient accuracy.

Keywords

eddy-current inductive transducer, conductivity measurements

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PWC-2003-TC7-039.pdf

DOI

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IMEKO TC

TC7 - Measurement Science

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