Sweat sensor

Abstract

The present invention relates to devices and methods for uptaking and analyzing sweat from a skin of a user. In particular, it is proposed to provide a variability in the size of the sweat sensor inlets (), which can be used for improving the determination of sweat parameters like for example determining the number of active sweat glands The variability in the size of the inlets () with which the sweat sensor () uptakes the sweat from the user's skin () can be achieved by having either plurality of inlets wherein at least some of them have different opening sizes and to use the differently sized inlets based in different situations. Alternatively, one or more inlets may have openings with variable cross-sectional area, like e.g. an adjustable diameter of their opening, and also a combination of these two alternatives is of course possible. A processor of the sweat sensor may use the information from either all or only the most appropriate sized inlets to determine a sweat parameter. In another alternative, the processor may adapt the inlet to the adjustable inlet opening to the most appropriate size to then determine a sweat parameter of interest.