Method of detecting biological sample

A method of detecting a biological sample, comprising:

• providing a magnetic sensor chip, wherein the magnetic sensor chip comprises a substrate and a magnetic sensing layer located on the substrate;
• connecting a plurality of probes to the magnetic sensor chip;
• providing a sample solution containing a plurality of biological samples labeled with a first marker on the magnetic sensor chip, so that the plurality of biological samples labeled with the first marker are hybridized with the plurality of probes;
• providing a plurality of magnetic beads labeled with a second marker on the magnetic sensor chip, so that the plurality of magnetic beads labeled with the second marker are bound onto the plurality of biological samples labeled with the first marker;
• and
• detecting a signal sensed by the magnetic sensing layer by a magnetic sensor.