Resettable Microfluidics for Broad-Range and Prolonged Sweat Rate Sensing

Mallika Bariya, Noelle Davis, Liam Gillan, Elina Jansson, Annukka Kokkonen, Colm McCaffrey, Jussi Hiltunen, Ali Javey (Corresponding Author)

Research output: Contribution to journalArticleScientificpeer-review

Abstract

Wearable sweat sensors are emerging as promising platforms for personalized and real-time tracking of evolving health and fitness parameters. While most wearable sweat sensors focus on tracking biomarker concentration profiles, sweat secretion rate is a key metric with broad implications for assessing hydration, cardiac, and neural conditions. Here we present a wearable microfluidic sensor for continuous sweat rate measurement. A discrete impedimetric sensing scheme relying on interdigitated electrodes within a microfluidic sweat collector allows for precise and selective sweat rate measurement across a broad physiological range. Integration of a manually activated pressure pump to expel sweat from the device prevents sensor saturation and enables continuous sweat rate tracking over hours. By enabling broad range and prolonged sweat rate measurement, this platform tackles a key obstacle to realizing meaningful and actionable sweat sensing for applications in exercise physiology and medicine.

Original languageEnglish
Pages (from-to)1156-1164
Number of pages9
JournalACS Sensors
Volume7
Issue number4
DOIs
Publication statusPublished - 22 Apr 2022
MoE publication typeA1 Journal article-refereed

Keywords

  • continuous monitoring
  • flexible sensor
  • printed electronics
  • sweat rate
  • sweat sensor
  • wearable electronics

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