Biosensors are analytical devices that detect biological processes and convert them into electrical signals. They have four main components: an analyte, bioreceptor, transducer, and signal display. The bioreceptor interacts with the analyte and the transducer measures this interaction and outputs a signal proportional to the analyte concentration. There are several types of biosensors including resonant, optical, thermal, piezoelectric, and electrochemical biosensors. Biosensors have been miniaturized in recent years and can be used for applications like glucose monitoring, COVID-19 detection, and food safety testing.

1. RESEARCH POSTER PRESENTATION DESIGN © 2015
www.PosterPresentations.com
Arnab Panja
INTRODUCTION
DEFINITION:A Biosensor is an analytical device that detects changes in
Biological processes and converts them into an electrical signal. The term Biological
process can be any biological element or material like enzymes, tissues,
microorganisms, cells, acids, etc.
 COMPONENTS: Components of biosensors are:
1.Analyte
2. Bioreceptor
3.Transducer
4. Signal Display
 BASIC CHARACTERISTICS OF A BIOSENSOR:
LINEARITY- should be high-for the detection of high substrate concentration.
 SENSITIVITY- value of electrode response per substrate concentration.
SELECTIVITY- chemical interface must be minimized for obtaining result.
RESPONSE TIME - time necessary for having 95% of the response.
WORKING PRINCIPLE
Biosensors are operated based on the principle of signal transduction. These
component include Analyte, bioreceptor, Transducer & Signal Display. The bio-
recognition element, essentially a bioreceptor, is allowed to interact with a specific
analyte. The transducer measures this interaction and outputs a signal. The intensity
of the signal output is proportional to the concentration of the analyte. The signal is
then amplified and processed by the electronic system.
APPLICATION
EXAMPLES OF BIOSENSOR DEVICE
TYPES OF BIOSENSOR
Resonant Biosensors - An acoustic wave transducer combined with the
bioreceptor & the resonant frequency changes .
Optical Detection Biosensors – measures change in light adsorption.
Thermal Detection Biosensors – use absorption/production of heat. Temp
measured by thermisters.
.Piezoelectric Biosensors.-Uses Gold To detect specific angle at which ȇ waves
are emitted when the substance is exposed to laser light/crystals like quartz, which
vibrates under the influence of an electric field.
Electrochemical Biosensors – generation of ions by various chemical reactions
that change the electrical properties of solution that can be sensed & measured .
OPTICAL BIOSENSOR RESONANT BIOSENSOR THERMAL BIOSENSOR
ELECTROCHEMICAL BIOSENSOR PIEZOELECTRIC BIOSENSOR
CONCLUSION
Biosensors have been miniaturized extensively in the recent years. Keeping in line
with such developments, microbial cells with high enzyme behaviors may be
needed. Due to the low cost of microorganism , long lifetime and broad range of
suitable PH and temperature, have been widely employed as the Biosensing element
in the construction of biosensors. So the proper use of biosensors should be done in
order to have a great benefit in future.
REFERENCES
Nemane ST, Gholve SB, Bhusnure OG, Mule ST, Ingle SV, Biosensors: An Emerging Technology
in Pharmaceutical Industry, Journal of Drug Delivery and Therapeutics. 2019; 9(4):643-647
Singh S., Kumar V., Dhanjal D.S., Datta S., Prasad R., Singh J. (2020) Biological Biosensors for
Monitoring and Diagnosis. In: Singh J., Vyas A., Wang S., Prasad R. (eds) Microbial
Biotechnology: Basic Research and Applications. Environmental and Microbial Biotechnology.
Springer, Singapore.
What are Biosensors? Principle, Working, Types and Applications. (2020). Retrieved 25
November 2020, from https://www.electronicshub.org/types-of-biosensors/
BIOSENSOR HISTORY
GLUCOSE BIOSENSOR COVID-19 BIOSENSOR TB BIOSENSOR
PREGNANCY BIOSENSOR FOOD BIOSENSOR WRIST WATCH BIOSENSOR