Tape-Free, Digital Wearable Band for Exercise Sweat Rate Monitoring

Manik Dautta, Luis Fernando Ayala-Cardona, Noelle Davis, Ashwin Aggarwal, Jonghwa Park, Shu Wang, Liam Gillan, Elina Jansson, Mikko Hietala, Hyunhyub Ko, Jussi Hiltunen, Ali Javey (Corresponding Author)

Research output: Contribution to journalArticleScientificpeer-review

9 Citations (Scopus)


Monitoring sweat secretion rate is essential for uncovering underlying physical conditions like hyperhidrosis, mental stress, and neural disorders. Often, flexible microfluidic sweat rate monitoring devices use tape as a means of attachment to the skin to tightly seal the collection area. While these single-use, adhesive-backed devices have lightweight and thin interfaces for mounting on the skin, their form factor complicates their potential integration with available commercial wearables, such as smartwatches. Here, a tape-free device, consisting of a 3D-printed sweat collector with a concave surface that is strapped onto the skin to form an effective seal, is presented. The materials, structure, and dimensions of the sweat collector are optimized for conformal device-to-skin contact and efficient capture of sweat. The collector is interfaced with a fluidic microchannel with embedded electrodes for continuous digital monitoring of sweat rate. Long-term exercise-induced local sweat rate from multiple body locations in both multi-subject and longitudinal studies is measured, depicting the correlation between the measured sweat profile and total body fluid loss. The simple installation procedure and reusability of this tape-free device make it a good candidate for integration with the band of a watch.

Original languageEnglish
Article number2201187
JournalAdvanced Materials Technologies
Issue number6
Publication statusPublished - 24 Mar 2023
MoE publication typeA1 Journal article-refereed


  • 3D printed
  • fluid loss
  • leakage-free
  • reusable
  • sweat rate
  • tape-free
  • wearable devices


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