Patent ID: 7662612
Filing Date: 2010-02-16
Classification: G01N

Abstract:
1. A sensor device, comprising: a cell for containing a solution in which a redox reaction product is generated; at least one support means within the cell, each of said at least one support means including a fixing means to immobilize only one subject to be detected; and a detection means separate from the support means for detecting a current generated from said redox reaction product, wherein: each reaction product is generated from each of the at least one subject to be detected and the at least one subject is detected by generation of said each reaction product in a corresponding reaction region; one or more reaction regions are formed, each reaction region having a constant concentration of each corresponding reaction product, and each reaction region being formed by diffusion of each reaction product through the solution; the at least one subject to be detected is immobilized in at least one region, each region having a radius of 50 μm to 100 μm; each reaction region and each corresponding region in which each subject is immobilized have substantially the same size, and each reaction region and a corresponding detection region are arranged in a relative positional relationship, such that said each reaction region and said each corresponding detection region overlap substantially significantly; the detection means comprises one or more electrodes, each electrode corresponding to each of the one or more reaction regions in a one-to-one relationship, and each electrode corresponding to each fixing means in a one-to-one relationship; and for the case of more than one electrode and corresponding more than one reaction region, the more than one reaction regions are separately formed by different reaction products.