BIOSENSOR WITH QUADRUPOLE MAGNETIC ACTUATION SYSTEM

摘要

The present invention provides a biosensor comprising means (5) for accommodating a fluid sample having a sensor surface at its bottom and means for detecting particles accumulated at and/or proximate the sensor surface. The biosensor further comprises a quadrupole magnetic unit (1, 2, 3, 4) adapted to provide a magnetic field gradient at the sensor surface, wherein the unit is arranged below the sensor surface.