MICROSENSOR DEVICE

摘要

The invention relates to a microsensor device like a magnetic biosensor (100). The microsensor device comprises an array of probe-sensors (10.1, 10.2, 10.3) for the measurement of a physical quantity, for example the concentration of molecules labeled with magnetic beads in a sample chamber. The array further comprises a reference-sensor ( 10.4) that is disposed close to the probe-sensors (10.1, 10.2, 10.3) but shielded from the physical quantity to be measured. The measuring signal of the reference-sensor (10.4) reflects the influence of environmental conditions like temperature and can therefore be used to correct the measuring signals of the probe-sensors (10.1, 10.2, 10.3). The sensors (10.1, 10.2, 10.3, 10.4) are connected via a multiplexer to the same detector unit for further processing in order to minimize variations and to reduce hardware complexity.