Examples of the disclosure relate to an apparatus for sensing biometric parameters. The apparatus may comprise heat transfer means configured to transfer heat from a first location to a location proximate to a subject's sweat glands. The apparatus may also comprise sweat transfer means configured to transfer sweat from the location proximate to a subject's sweat glands to one or more sensors wherein the one or more sensors are configured to sense one or more biometric parameters from the subject's sweat.
