Abstract: A device for magnetically detecting microscopic biological objects includes a microfluidic channel having a fluid inlet and a fluid outlet; a plurality of magnetic sensors arranged against an inner wall of the microfluidic channel; and a permanent magnet arranged against an outer wall of the microfluidic channel, in such a way that the plurality of magnetic sensors is immersed in a magnetic field created by the permanent magnet; the plurality of magnetic sensors including a first magnetic sensor; a second magnetic sensor opposite the first magnetic sensor; a third magnetic sensor downstream of the first and second magnetic sensors.

Abstract: The invention proposes several aspects of a Micro-Nano-Micro (MNM) device. According to one aspect, a plurality of observation channels are positioned in parallel, and each has a smaller cross-section in order to generate a disturbance in order to cause preconcentration. The cross-sections of two separate channels are different. According to another aspect, the observation channel has a smaller width, preferably with a constant depth. According to another aspect, a method for analysing and/or distinguishing between and/or sorting analytes is presented. Several types of analytes can be used. According to one aspect, a method for manufacturing a device according to the invention is presented.