Biosensor system for single particle detection

A biosensor system for the detection of particles comprising:

• a biosensor cartridge including a sensor surface;
• a magnet assembly on one side of the cartridge configured to generate a magnetic field effective at the cartridge and the sensor surface, the magnet assembly including at least two magnetic subunits separated by a gap;
• a first optical detection system configured to detect the particles, the optical system being arranged at a same side of the cartridge as the magnet assembly;
• wherein the magnet assembly and the first optical detection system are configured such that:
• a light cone of an incoming ray generated by scattering at the particles projects through the gap between the at least two magnet subunits of the magnet assembly and the magnet assembly actuates the particles and the first optical detection system detects the particles at the sensor surface at the same time.

A biosensor system for detecting particles, comprising:

• a biosensor cartridge including a sensor surface;
• a magnet assembly on one side of the cartridge configured to generate a magnetic field effective at the cartridge and the sensor surface, the magnet assembly including at least two magnetic subunits separated by a gap;
• a first optical detection system configured to detect the particles through the gap between the magnet subunits, the first optical subsystem being arranged at a same side of the cartridge as the magnet assembly;
• a second optical detection system configured to detect the particles and provide light for the first optical detection system by scattering light at the particles;
• and
• wherein the magnet assembly is arranged essentially at a perpendicular direction relative to the second optical detection system, and the at least two subunits include end sections projecting essentially upwards in the same direction as the first optical detection system and perpendicular to the at least two subunits.