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    A novel sweat rate and conductivity sensor patch made with low-cost fabrication techniques

    Year: 2020

    Authors: Steijlen, A. S. M.; Bastemeijer, J.; Jansen, K. M. B.; French, P. J.; Bossche, A.

    Organizations: Dutch Research Council (NWO)Netherlands Organization for Scientific Research (NWO) [P16-28]

    Keywords: Conductivity sensor; Sweat rate sensor; Sweat patch

    Sweat sensor patches offer new opportunities for unobtrusive monitoring of an athlete's physical status. This paper presents a novel sweat rate and sweat conductivity patch that is easy to prototype and can be made with common low-cost production techniques: laser cutting and standard printed circuit board (PCB) manufacturing. The device consists of a patch made from hydrophilic PET foil, a double-sided adhesive and a thin PCB with gold electrodes. Two electrodes, which are continuously in contact with the inflowing fluid, measure the sweat conductivity and a separate system with interdigitated electrodes measures the filling process of the reservoirs. Impedance measurement results of both systems demonstrate the working of the concept.