Patent ID: 8945946
Filing Date: 2015-02-03
Classification: G01N

Abstract:
1. A sensor device for detecting magnetic particles in a specimen, comprising: a sensor element having a detection surface for detecting the magnetic particles and capable of generating a magnetic field for collecting the magnetic particles on the detection surface by application of a current; a current applying unit for letting the current flow to the sensor element; and a signal taking out unit for obtaining a change in the magnetic field on the detection surface as an electrical output signal, wherein a circuit is formed by connecting the current applying unit to the sensor element with a wiring, wherein a cross-sectional area of the sensor element perpendicular to a direction of the current flowing on the sensor element is smaller than a cross-sectional area of the wiring perpendicular to a direction of the current flowing on the wiring, and wherein the center axis in the length direction of the sensor element is displaced from the center axis in the length direction of the wiring toward a region of the sensor device in which the magnetic particles exist.