There is provided a microscope comprising a micromanipulator, comprising a first electromagnet comprising a first magnetic core; a second electromagnet comprising a second magnetic core, wherein the first magnetic core and the second magnetic core are configured to generate a magnetic force on magnetic probes arranged within a biological matrix arranged in between the first magnetic core and the second magnetic core; and wherein the microscope comprises imaging means configured to capture images of the biological matrix comprising the magnetic probes for detection of displacements of the magnetic probes caused by the magnetic force.

A system for inspecting a fluid includes a lighting system for illuminating a fluid under inspection in an image detection area; an image capture system for capturing a sequence of images of the fluid in the image detection area; a magnetic component for generating a magnetic field towards the image fluid under inspection, the magnetic component having at least one coil for generating a magnetic field, whereby ferromagnetic particles in the fluid under inspection are prevented from reaching the image detection area; wherein the image capture system is configured to capture an image of the fluid in the image detection area before the magnetic field is applied and an image of the fluid in the image detection area after the magnetic field is applied, free of ferromagnetic particles; and a processing component configured to compare the images of the fluid under inspection and count the ferromagnetic particles in the fluid.