2. Introduction
A biosensor is a device that measures biological or chemical
reactions by generating signals proportional to the
concentration of an analyte in the reaction.
Biosensors are employed in applications such as disease
monitoring, drug discovery, and detection of pollutants,
disease causing micro-organisms and markers that are
indicators of a disease in bodily fluids .(blood)
3. Definition of sensors
Sensor
A sensor is a device that detects and responds to some
type of input from the physical environment. The specific
input could be light, heat, motion, moisture, pressure.
4. Biosnesors
Biosnesors are analytical tools for the analysis of bio-
material samples to gain an understanding of their bio-
composition, structure and function by converting a
biological response into an electrical signal.
8. Applications of Biosensors
1. Biosensors for Clinical Diagnostics
Glucometer is a medical device for determining the
approximate concentration of glucose in the blood.
10. 3. Food Industry
Biosensors are used in food industry for
food quality control for measurement of amino
acids, carbohydrates, alcohols, gases, etc.
11. Advantages of biosensor
Specific in response to analyte
Rapid response
Simple to operate
Require no pretreatment of sample
Ease to use
Economical
12. Conclusions
Biosensors are nowadays ubiquitous in biomedical diagnosis as well as
a wide range of other areas such as point-of-care monitoring of
treatment and disease progression, environmental monitoring, food
control, drug discovery, and biomedical research.
13. Reference
[1] Malhotra, B. D., R. Singhal, A. Chaubey, S. K. Sharma and A. Kumar, 2005.
Recent Trends in Biosensors. Current Applied Physics., 5: 92-97.
[2] D’Souza, S.F., 2001. Microbial biosensors. Biosensors & Bioelectronics., 16:
337–353.
[3] Turner A.P.F., I. Karube and G.S. Wilson (Eds.), 1992. Biosensors:
Fundamentals and Applications, Mir Publishers, Moscow.
[4] D’Souza, S.F., 1999. Immobilized enzymes in bioprocess. Curr. Sci., 77:69–
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[5] Bilitewski, U., Turner, A.P.F. (Eds.), 2000. Biosensors for Environmental
Monitoring.Harwood Academic, Amsterdam.
