One side electrode type fluidic based capacitive pressure sensor

M. N.M. Nawi, A. A. Manaf, M. F.A. Rahman, M. R. Arshad, O. Sidek

Research output: Chapter in Book or Report/Conference proceedingConference Proceedingpeer-review

1 Citation (Scopus)

Abstract

This paper presents the novel fluidic based capacitive pressure sensor. The electrical double layer capacitor (EDLC) concept was applied as a sensing method. The methanol was selected as an electrolyte due to its liquid properties such as low surface tension and dielectric permittivity. The circular membrane and microchannel were fabricated using PDMS material and the one side electrode was fabricated on the printed circuit board (PCB). PDMS was used as an insulator on the electrode to allow the formation of the ionic layer. The value of capacitance depends on the liquid movement inside the microchannel. The result of membrane deflections for PDMS membrane with dimension 2.8mm×2. 8mm×1.5mm deviated compared to the simulation where it was assumed that the simulation model is was linear. From the experimental results, the operating frequency, response time and sensitivity of the sensor were 1.2 kHz, 0.21 s and 0.033 pF/kPa, respectively.

Original languageEnglish
Title of host publicationIEEE SENSORS 2013 - Proceedings
PublisherIEEE Computer Society
ISBN (Print)9781467346405
DOIs
Publication statusPublished - 2013
Externally publishedYes
Event12th IEEE SENSORS 2013 Conference - Baltimore, MD, United States
Duration: 4 Nov 20136 Nov 2013

Publication series

NameProceedings of IEEE Sensors

Conference

Conference12th IEEE SENSORS 2013 Conference
Country/TerritoryUnited States
CityBaltimore, MD
Period4/11/136/11/13

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