A self-adaptive and wide-range conductivity measurement method based on planar interdigital electrode array

Xiaolei Wang, Yuhao Wang*, Henry Leung, Subhas Chandra Mukhopadhyay, Shaoping Chen, Yongqiang Cui

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)
21 Downloads (Pure)

Abstract

Conductivity is a crucial parameter in water quality detection, which can roughly represent overall concentration of various inorganic ions. However, traditional conductivity sensors can only afford high performance measurement in a relatively low range while the concentration may vary much more in real-world water environment. This paper proposes a high-precision and wide-range measurement method based on a novel planar interdigital electrode sensor array and a self-adaptive algorithm. The array is composed of 3 pairs of planar electrodes with various cell constants aiming at different subdivided conductivity sections. The follow-up circuit and the self-adaptive algorithm keep the optimal electrode pair dominates the output of the array. Numerical simulations were utilized to optimize sensor parameters before fabrication. PCB manufacturing technique was used which guaranteed a relatively low manufacturing cost and stable performance. Experiments were conducted to verify the sensing performance and results showed that the array can maintain precise measurement from 0.5μs/cm to 500ms/cm.

Original languageEnglish
Pages (from-to)173157-173165
Number of pages9
JournalIEEE Access
Volume7
DOIs
Publication statusPublished - 2019

Bibliographical note

Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

Fingerprint Dive into the research topics of 'A self-adaptive and wide-range conductivity measurement method based on planar interdigital electrode array'. Together they form a unique fingerprint.

Cite this