A METHOD AND A DEVICE FOR ATTRACTING MAGNETIC PARTICLES TO A SURFACE

摘要

The invention relates to a method for attracting magnetic particles (1) to a contact surface (11) in an associated sensor device (100). The attraction of the magnetic particles is achieved by generating a pulsed magnetic field (B) according to an actuation protocol, wherein said protocol includes a "local attraction phase" during which the duty cycle of the pulsations is smaller than about 10%, preferably ranging between 2% and 5%. It turns out that these small duty cycles are advantageous in bringing magnetic particles (1) into actual contact with the contact surface (11).