Characterization of non-contact measurements of electrolyte concentrations using a printed mutual-capacitive sensor film

We have characterized a non-contact measurement system to concentrations of electrolytic solutions using a sensor film that is pasted on the outer surface of the solution vessel. This sensor film has asymmetrically sized circular electrodes printed facing each other on the both faces of substrate, a...

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Bibliographic Details
Published inJapanese Journal of Applied Physics Vol. 58; no. 3; pp. 36504 - 36509
Main Authors Iwata, Shiro, Imawaka, Naoto, Yoshino, Katsumi, Nomura, Ken-ichi, Horii, Yoshinori, Kaji, Ryosaku, Ushijima, Hirobumi
Format Journal Article
LanguageEnglish
Published Tokyo IOP Publishing 01.03.2019
Japanese Journal of Applied Physics
Subjects
electrolyte concentration
Electrolytes
frequency dependence
mutual-capacitive sensor
non-contact
Printed sensor film
Sensors
Substrates
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Summary:We have characterized a non-contact measurement system to concentrations of electrolytic solutions using a sensor film that is pasted on the outer surface of the solution vessel. This sensor film has asymmetrically sized circular electrodes printed facing each other on the both faces of substrate, and operates as a mutual-capacitive sensor. This measurement system shows the response depend on the strength of the electrolyte dissociation. In addition, it is found that the resolution and the sensing range could be controlled by adjusting the frequency of the applied voltage in the range from 10 kHz to 1 MHz.
Bibliography:JJAP-101099.R1
ISSN:0021-4922
1347-4065
DOI:10.7567/1347-4065/ab022c