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Sensors 2017, 17(1), 42; doi:10.3390/s17010042

Feasibility Test of a Liquid Film Thickness Sensor on a Flexible Printed Circuit Board Using a Three-Electrode Conductance Method

1
Department of Nuclear Engineering, Seoul National University, Seoul 08826, Korea
2
Department of Nuclear Safety, Korea Institute of Nuclear Safety, Daejeon 34142, Korea
3
Thermal Hydraulics Safety Research Division, Korea Atomic Energy Research Institute, Daejeon 34057, Korea
*
Author to whom correspondence should be addressed.
Academic Editors: Remco J. Wiegerink and Luis J. Fernandez
Received: 4 October 2016 / Revised: 19 December 2016 / Accepted: 22 December 2016 / Published: 27 December 2016
(This article belongs to the Special Issue Microfluidic Sensors and Control Devices)
View Full-Text   |   Download PDF [8295 KB, uploaded 27 December 2016]   |  

Abstract

Liquid film thickness measurements under temperature-varying conditions in a two-phase flow are of great importance to refining our understanding of two-phase flows. In order to overcome the limitations of the conventional electrical means of measuring the thickness of a liquid film, this study proposes a three-electrode conductance method, with the device fabricated on a flexible printed circuit board (FPCB). The three-electrode conductance method offers the advantage of applicability under conditions with varying temperatures in principle, while the FPCB has the advantage of usability on curved surfaces and in relatively high-temperature conditions in comparison with sensors based on a printed circuit board (PCB). Two types of prototype sensors were fabricated on an FPCB and the feasibility of both was confirmed in a calibration test conducted at different temperatures. With the calibrated sensor, liquid film thickness measurements were conducted via a falling liquid film flow experiment, and the working performance was tested. View Full-Text
Keywords: liquid film thickness; liquid film sensor; three electrode conductance method; two-phase flow experiment liquid film thickness; liquid film sensor; three electrode conductance method; two-phase flow experiment
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Lee, K.B.; Kim, J.R.; Park, G.C.; Cho, H.K. Feasibility Test of a Liquid Film Thickness Sensor on a Flexible Printed Circuit Board Using a Three-Electrode Conductance Method. Sensors 2017, 17, 42.

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