Patent ID: 9739718
Date: 2017-08-22
CPC Classifications: B01L,G01N

Claim:
1. A fluidic device for measuring concentration of a target in solution comprising: a microchannel in a material, the microchannel having an inlet at a first end; at least the portion of the walls of the microchannel near the first end coated with a receptor, the receptor reactive with the target to form a cross-linked coating; the material at at least the first end of a deformable material, and the microchannel at at least the first end having a geometric cross-section, the cross-section and the deformable material such that the microchannel is deformable and constrictable by a progressing crosslinking between opposing wall surfaces where crosslinking between opposing wall surfaces deforms the microchannel to constrict the microchannel until closure of the microchannel to provide a concentration flow valve effect where flow distance of the solution in the microchannel until closure depends on concentration of the target; the microchannel and material having properties to show visual contrast between a portion of the microchannel filled with solution, and a portions of the microchannel not filled with solution.