Patent ID: 7767437

Claim:
A liquid transport structure for use with an assay, comprising: a plurality of sensors positioned on a sensor support and a plurality of electrical contact pads positioned on the sensor support, each sensor including a plurality of electrodes, the electrodes included in each one of the sensors including a working electrode, a counter electrode, and a reference electrode, each of the electrodes being in electrical communication with a different one of the contact pads; a first member including a recess extending part way into a first side of a first member substrate, the first member substrate being a single layer of material; a reservoir within the first member, the reservoir being partially defined by a recess extending part way into a second side of the first member substrate, the second side of the first member substrate being opposite the first side of the first member substrate; an inlet channel for transporting a liquid from outside of the liquid transport structure into the reservoir; and an outlet channel for transporting a liquid held in the reservoir to the recess extending part way into the first side of the first member substrate; a second member comprising a second member substrate; and the first member and the second member being independent of the sensor support and being configured to be coupled with the sensor support such that the sensor support is between the first member and the second member and such that the contact pads are not covered by either the first member or the second member, the first member and the second member being configured to be coupled with the sensor support such that one of the sensors is positioned in a chamber that is at least partially defined by the recess extending part way into the first side of the substrate and such that a waste channel that extends from the chamber through the sensor support and through the second member to outside of the liquid transport structure is at least partially defined by the sensor support and the second member substrate.