Electrochemical sensor without calibration

Details Electrochemical sensor without calibration Electrochemical sensor without calibration

G - Physics

01

N

G01N 27/26 (2006.01) C12Q 1/54 (2006.01) G01N 27/30 (2006.01)

Patent

CA 2196391

Electrochemical sensor, comprising a thin elongated insulating substrate (1) supporting two conductive strips (4, 5) of width L and L', whose facing edges (4a, 5a) are insulated from each other by a space (6) of width .delta., a insulating covering film (2), comprising a connecting window (8) and at least one measurement window (11) provided with two openings (12, 13) separated by a portion (14) of said covering film (2), and delimiting the useful surfaces of measurement (16) and reference (17) electrodes, each opening (12, 13) having at any point dimensions measured perpendicularly to the median line (3) such that the furthest edge (12b, 13b) from the edge (4a, 5a) of the portion of the strip (4, 5) forming the electrode (17, 16) which said opening (12, 13) does not uncover is situated at a distance comprised between L + .delta. and .delta. (respectively L' + .delta. and .delta.) and the closest edge (12a, 13a) at a distance greater than .delta.. Application to glucose sensors.

L'invention est un détecteur électrochimique constitué de minces substrats isolants allongés (1) portant deux bandes conductrices (4, 5) de largeur L et L' dont les bords opposés (4a, 5a) sont séparés l'un de l'autre par un espace (6) de largeur , une couche de protection isolante (2) comportant une fenêtre de connexion (8) et au moins une fenêtre de mesure (11) ayant deux ouvertures (12, 13) séparées par une partie (14) de la couche de protection (2) et délimitant les surfaces de mesure utiles (16) et les électrodes de référence (17), chaque couverture (12, 13) ayant à tout point des dimensions mesurées perpendiculairement à la ligne médiane (3) de telle sorte que le bord le plus éloigné (12b, 13b) du bord (4a, 5a) de la partie de la bande (4, 5) formant l'électrode (17, 16) que ladite ouverture (12, 13) ne découvre pas est situé à une distance comprise entre L + et (respectivement L' + et ) et le bord le plus rapproché (12a, 13a), à une distance supérieure à . Application aux détecteurs de glucose.

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