Patent ID: 8317997

Claim:
An oxidation-reduction potential test device, comprising: a substrate; a sample chamber; a first test lead supported by the substrate, the first test lead including: a first area extending into the sample chamber; a second area extending from the sample chamber; a reference cell; a reference lead, including; a first area in electrical contact with the reference cell; a second area extending from the reference cell; a bridge, wherein a fluid sample in the sample chamber is placed in electrical contact with the reference cell by the bridge; an overlay, wherein at least a portion of the first test lead, the reference cell, at least a portion of the reference lead, and the bridge are held between the substrate and the overlay when the overlay is interconnected to the substrate, wherein the overlay includes an aperture, and wherein the aperture corresponds to at least a portion of the sample chamber when the overlay is interconnected to the substrate; a filter element, wherein the filter element at least one of extends over and is contained within the sample chamber.