Characterization of non-contact measurements of electrolyte concentrations using a printed mutual-capacitive sensor film. (1st March 2019)

• Record Type: Journal Article
• Authors: Iwata, Shiro; Imawaka, Naoto; Yoshino, Katsumi; Nomura, Ken-ichi; Horii, Yoshinori; Kaji, Ryosaku; Ushijima, Hirobumi
• Is Part Of: Japanese journal of applied physics. Volume 58:Number 3(2019)
• Publication Date: 2019-03-01
• Subjects: Printed sensor film -- mutual-capacitive sensor -- non-contact -- electrolyte concentration -- frequency dependence; Physics -- Periodicals; 621.05
• DOI: 10.7567/1347-4065/ab022c
• Languages: English
• ISSNs: 0021-4922

Abstract

Abstract: 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.