Figure 1

Wearable sweat chloride sensor. (A) Photograph of the potentiometric sweat sensor. (B–D) Distribution of sensor voltages in (B) 10 mM, (C) 50 mM, and 100 mM NaCl solutions (N = 65). Box and whisker plots display the minimum, first quartile, median, third quartile, and maximum values. (E) Average calibration curve obtained from the 65 sensors used in this study.