A device that uses an immobilized agent to detect
or measure a chemical compound.
The agents include
enzymes, antibiotics, organelles, or whole cells
A reaction between the immobilized agent and the molecule
being analysed is transduced into an electronic signal.
This signal may be produced in response to the presence
of a reaction product, the movement of electrons,
or the appearance of some other factor (e.g light)
Biosensors are being used increasingly in diagnostic
tests these allow quick, sensitive, and specific analysis
of a wide range of biological products, including
antibiotics, vitamins and other important biomolecules
as well as the determination of certain xenobiotics,
such as synthetic organic compounds.