Fig. 4: Final device components and validation.
From: Self-powered smart patch for sweat conductivity monitoring
a Exploded view of the final device with the different layers (scale bar = 1 cm). b, c Operation of the device with artificial sweat samples at the two conductivities of 48 mM equiv NaCl and 60 mM equiv NaCl. d Gaussian distribution of the accumulated charge at the two sample conductivities. e Final representation of the results provided by all devices compared with the known condition of the samples—healthy and unhealthy
