The design of an electrical capacitance tomography sensor for use with media of high dielectric permittivity

A.J. Jaworski, G.T. Bolton

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This paper concerns the application of electrical capacitance tomography (ECT) for media of high dielectric permittivity such as water. The performance of an ECT sensor was analysed numerically for a range of dielectric materials (1≤εr≤80) and geometrical parameters. On the basis of numerical simulations an ECT sensor with internal electrodes was built. Experimental results concerned with imaging air voids in distilled water and water-continuous dispersions of oil, using a commercially available PTL tomography system, are presented. Effects arising from the conductivity of water are studied and prospects of using the ECT system in an `electrical resistivity' mode for weakly conductive solutions are outlined.
Original languageEnglish
Pages (from-to)743-757
Number of pages15
JournalMeasurement Science and Technology
Issue number6
Publication statusPublished - Jun 2000
Externally publishedYes


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