Patent ID: 6821400
Filing Date: 2004-11-23
Classification: C12Q,G01N

Abstract:
An electrochemical sensor for determining the concentration of a constituent present in a solution or in a liquid of natural or biological origin, formed by a tongue including a thin plastic substrate supporting at least two current conducting strips separated by a narrow insulating strip of the substrate, said substrate and said conducting strips being covered with a plastic covering into which are cut, at one end, an opening allowing portions of said conducting strip to appear for connection to an electronic apparatus, and, close to the other end, two windows laterally separated by a strip of the plastic covering, said windows delimiting on the conducting strips the useful surfaces of a reference electrode beneath a first reference window and a measuring electrode beneath a second measuring window coated with a reagent of the constituent whose concentration one wishes to determine, wherein at least the measuring window has a rounded elongated contour along a length of the tongue, andwherein said strip of the plastic covering has substantially uniform lateral width over the length of the two windows.