Patent ID: 8617367

Claim:
An electrochemical test sensor for detecting the concentration of an analyte in a fluid test sample, the electrochemical test sensor comprising: a base that provides a flow path for the fluid test sample having on its surface a counter electrode and a working electrode adapted to electrically communicate with a detector of electrical current; a dielectric layer forming a dielectric window therethrough; a reagent layer including an enzyme that is adapted to react with the analyte; and a lid adapted to mate with the base and to assist in forming a capillary space with an opening for the introduction of the fluid test sample thereto, wherein the dielectric layer and the reagent layer are located between the base and the lid, wherein an exposed portion of the working electrode for being exposed to the fluid test sample is defined in a width-wise dimension by the dielectric window, wherein an exposed portion of the counter electrode for being exposed to the test fluid sample is defined in a width-wise dimension by at least a portion of the dielectric window and at least a portion of the capillary space, the at least a portion of the dielectric window being different from the at least a portion of the capillary space, wherein a width of the exposed portion of the counter electrode defined by the dielectric window is different than a width of the exposed portion of the counter electrode defined by the capillary space.