Bi-metallic stitched E-textile sensors for sensing salinized liquids

Esther W. Foo, Robert M.T. Pettys-Baker, Shawn Sullivan, Lucy E. Dunne

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Scopus citations


Sensing in e-textiles has generated great interest in a wide range of applications, including wetness detection. A common application for wetness detection sensors is the detection of urine in absorbent products such as diapers. However, unlike water, salinized liquids like urine accelerate the process of chemical reaction of integrated conductors (especially when exposed to electrical current), limiting the lifespan of e-textile sensors. This paper explores an approach to extending the lifespan of conductive thread sensors by blending copper filament with silver threads, and a comparative bench test of the effect of adding copper on the functional lifespan of a wetness sensor when exposed to saline. We find that while the bi-metallic sensor is effective in lengthening the lifespan of the conductive traces, it is likely due to the increased metal content rather than selective reaction of one metal to preserve the other. We make suggestions for further optimizing sensors.

Original languageEnglish (US)
Title of host publicationISWC 2017 - Proceedings of the 2017 ACM International Symposium on Wearable Computers
PublisherAssociation for Computing Machinery
Number of pages4
ISBN (Electronic)9781450351881
StatePublished - Sep 11 2017
Event29th ACM International Symposium on Wearable Computers, ISWC 2017 - Maui, United States
Duration: Sep 11 2017Sep 15 2017

Publication series

NameProceedings - International Symposium on Wearable Computers, ISWC
VolumePart F130534
ISSN (Print)1550-4816


Conference29th ACM International Symposium on Wearable Computers, ISWC 2017
Country/TerritoryUnited States

Bibliographical note

Funding Information:
This research was supported by the Kimberly Clark Corporation.

Publisher Copyright:
© 2017 Association for Computing Machinery.


  • E-textiles
  • Fluid sensor
  • Sweat sensor
  • Urine sensor


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