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Related Experiment Video

Updated: Jan 22, 2026

A Detailed Protocol for Perspiration Monitoring Using a Novel, Small, Wireless Device
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A Wearable Paper-Based Sweat Sensor for Human Perspiration Monitoring.

Marc Parrilla1, Tomàs Guinovart1, Jordi Ferré1,2

  • 1Departament de Química Analítica i Química Orgànica, Universitat Rovira i Virgili (URV), C/Marcel·l. Domingo 1, 43007, Tarragona, Spain.

Advanced Healthcare Materials
|July 12, 2019
PubMed
Summary

This study presents a novel wearable paper sensor using carbon nanotubes to track sweat loss and hydration status during exercise. This simple, low-cost device offers accurate, real-time monitoring for athletes and health applications.

Keywords:
carbon nanotubeschemiresistorsdehydration monitoringpaper-based sensorssweat analysiswearable sensors

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Area of Science:

  • Materials Science
  • Biomedical Engineering
  • Analytical Chemistry

Background:

  • Accurate monitoring of perspiration dynamics is crucial for athletes and health management.
  • Existing methods for sweat analysis can be complex, costly, or lack real-time in situ capabilities.
  • There is a need for simple, low-cost, and wearable sensors for continuous biofluid monitoring.

Purpose of the Study:

  • To fabricate and characterize a wearable paper-based chemiresistor for monitoring perspiration dynamics.
  • To introduce a novel method for quantifying microliter-level aqueous solution delivery using resistance changes.
  • To demonstrate the sensor's utility in monitoring sweat loss during exercise with a wireless interface.

Main Methods:

  • Fabrication of a nanocomposite sensor using single-walled carbon nanotubes and sodium dodecylbenzenesulfonate on filter paper.
  • Utilizing a linear resistance change along conducting paper to measure aqueous solution volume.
  • Integration with a wireless reader and user-friendly interface for real-time data acquisition.

Main Results:

  • The sensor demonstrated a linear resistance change corresponding to the volume of delivered aqueous solution.
  • Successful monitoring of sweat loss in humans during exercise was achieved.
  • The sensor exhibited analytical performance suitable for biofluid detection.

Conclusions:

  • A cost-effective, simple, and wearable paper-based chemiresistor for monitoring sweat dynamics was successfully developed.
  • This sensor technology holds promise for various on-body biofluid detection applications, including hydration status monitoring for athletes.
  • The developed sensor addresses key barriers, enabling future applications in sports performance and health management.