MAGNETIC SENSOR DEVICE

摘要

The present invention provides a magnetic sensor device (20) comprising at least one sensor surface lying in a first plane, a first magnetic field generating means (12) for attracting magnetic or magnetizable objects (15) toward a sensor surface (13), the first magnetic field generating means (12) lying in a second plane different from and substantially parallel to the first plane, and a second magnetic field generating means (14) for magnetizing magnetic or magnetizable objects (15) which are bond to the sensor. The spacing between the first magnetic field generating means (12) and the at least one sensor element (11) is smaller than 2 µm down to optionally overlapping. The present invention furthermore provides a method for determining the presence and/or amount of magnetic or magnetizable objects (15) in a sample fluid using the magnetic sensor device (20) according to embodiments of the invention.