Figure 2

(A) Step response curve of wearable sweating ratemeter. Maximum response is obtained at approximately 17Â s, and the baseline level regains the initial level after stopping the perfusion of air at 19Â s. (B) Relationship between electrical output obtained with wearable ratemeter (the ordinate) and amount of water loss over 5Â min (abscissa). The sensitivity of the wearable ratemeter is 1.0Â V/1Â mg/1Â min.