2. Introduction
• An electronic device intended to detect
odours and flavours
• Use sensor arrays and pattern recognition
systems.
• Used for identification ,comparison and
quantification
• Used to fulfill industrial needs .
3. Working Principle
Electronic Nose comprises mainly three parts:
1. A sample delivery System
2. A detection System
3. A computing System
4. Sample Delivery System
• Enables generation of a sample which is to be
analyze.
• Then it is injected to detection system.
5. Detection System
• Contains a group of sensors to sense the
compound
• Sensors react to the compound and the
response is recorded by an electronic
interface.
• Transforms signal into digital value.
6. Computing System
• It combines the responses of all sensors to
produce a result.
• These results can be easily analyzed with a
database of qualified samples.
• New samples are identified by comparing
those with the samples in database.
7. Application
In Quality Control Laboratories
Conformity of raw materials and final products
Detection of contamination , spoilage and
adulteration.
Origin or vendor selection.
Monitoring the storage condition.
8. Possible and future application in the field of
health and security.
Detection of dangerous and harmful bacteria
which may lead to contamination of other
patients.
Detection of lung cancer or other diseases by
detecting volatile organic compounds
To detect bacterial or insect contamination of food
materials.
Nasal implants to those who has weak sense of
smell
The brain Mapping Foundation used e-nose to
find brain cancer
9. Possible and future applications in the field of
crime prevention and security.
Can use e-nose to detect odourless chemicals like
natural gas
to detect drug odours despite other airborne odours
capable of confusing police dogs.
It may also be used as a bomb detection method in
airports.
10. In environmental monitoring
For identification of volatile organic compounds in
air, water and soil samples.
For environmental protection.
11. Example of Electronic Nose
• The Cyranose 320 is a handheld “electronic nose” developed by
Cyrano Sciences of Pasadena, California in 2000. Cyrano Sciences
was founded in 1997, 9 years after the concept of an “electronic
nose” based on using multiple semi-selective sensors combined
with electronic computation was first proposed by Gardner and
Bartlett.The Cyranose 320 is based on sensor research performed
by Professor Nathan Lewis of the California Institute of
Technology.Applications researched using the Cyranose 320 include
the detection of COPD, and other medical conditionsas well as
industrial applications generally related to quality control or
contamination detection.
• Chronic obstructive pulmonary disease (COPD) is an umbrella term
for people with chronic bronchitis, emphysema or both.
