Journal
ACS SENSORS
Volume 5, Issue 12, Pages 3821-3826Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acssensors.0c01219
Keywords
sweat rate; wearable sensors; capacitance; on-body trials; exercise intensity
Funding
- Cystic Fibrosis Foundation [SEARSO18K0]
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Individualized measurement of sweat loss under heat stress is important in assessing physical performance and preventing heat-related illness for athletes or individuals working in extreme environments. The objective of this work was to develop a low-cost and easy-to-fabricate wearable sensor that enables accurate real-time measurement of sweat rate. A capacitive-type sensor was fabricated from two conducting parallel plates, plastic insulating layers, and a central microfluidic channel formed by laser cutting a plastic film. The device has no microfabricated electrodes and is assembled using adhesive tape. Sensor accuracy was validated at different flow rates and confirmed using an equivalent circuit model of the device. On-body measurements demonstrate the feasibility of real-time measurements and show good agreement with values determined from a conventional sweat collection device.
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