THREE-DIMENSIONAL VERTICAL HYDRATION/DEHYDRATION SENSOR

摘要

A three-dimensional fluidic assay device or sensor is described. The sensor has a porous substrate with a first face or plane defined along x-y coordinate axes, and a second face remote in a z-direction from the first face. The first face contains a sample deposition zone and the second face has at least one detection zone, such that when a fluid sample is deposited in the sample deposition zone, fluid is transported by means of capillary action along the z-direction to the detection zone and manifests a signal development. An absorbent article, such as a diaper or feminine hygiene product, having such a three- dimensional sensor integrated across the thickness of the absorbent article, from an inner layer to an outer layer, is also described.