Patent ID: 6613205
Filing Date: 2003-09-02
Classification: G01N

Abstract:
An electrochemical sensor comprising:an electrically insulating, planar substrate having a planar surface, an electrochemically active sensor layer, which is applied by means of thick film techniques in at least one region of said planar substrate, said sensor layer containing at least one oxide of a metal belonging to one of the subgroups 7 and 8 of the Periodic Table of chemical elements as sensor component, and contacting in a measuring area an aqueous sample to be determined, at least one conductive path for signal pick-up which is applied on said planar substrate by means of thick film techniques and which is located entirely outside of said measuring area, and wherein said electrochemically active sensor layer extends from said measuring area as an electrically conductive bridge layer in a direction essentially in parallel with said planar surface of said substrate and outside said measuring area to contact said conductive path, wherein said bridge layer is electrically insulated and wherein a ratio of length l of said bridge layer outside of said measuring area to thickness d thereof is greater than 5.