2. CONTENTS
HISTORY OF E-NOSE
INTRODUCTION OF E- NOSE
TYPES OF E- NOSE
COMPONENT OF E-NOSE
EXPERIMENTAL SETUP
SENSOR
TYPES OF SENSORS
APPLICATIONS
ADVANTAGES
FUTURE SCOPE
CONCLUSION
Mayank Garg
Slide 2
BITS Pilani, Hyderabad Campus
3. HISTORY OF E-NOSE
First appeared in a paper by
Persuade and Dodd (1982).
The E-nose was developed on 19th august 2008.
Mayank Garg
Slide 3
BITS Pilani, Hyderabad Campus
4. ELECTRONIC NOSE
E-NOSE is a device that identifies the specific components
of an odour & analyses its chemical makeup to identify it.
• Details of assignments and project will be announced in the class & on course web
page.
• 5 Assignments – best 4 will be considered for final grading; mix of theoretical
(paper presentation) and practical – with Demo
• Project involves three demos (1) feasibility (2) proof of concept (3) Complete
demo with weightage of 4%, 7% and 9% respectively.
Mayank Garg
Slide 4
BITS Pilani, Hyderabad Campus
5. TYPES OF E-NOSE
S. O. D. system E-NOSE
M.F.S. E-NOSE
Mayank Garg
Slide 5
BITS Pilani, Hyderabad Campus
6. COMPONENTS OF E-NOSE
SAMPLE DELIVERY SYSTEM
DETECTION SYSTEM
COMPUTING SYSTEM
Mayank Garg
Slide 6
BITS Pilani, Hyderabad Campus
11. TYPES OF SENSORS
A sensor is a device which can respond to some properties of
the environment and transform the response into an
electric signal.
Mayank Garg
Slide 11
BITS Pilani, Hyderabad Campus
12. CONDUCTIVITY SENSORS
Exhibit a property of change when exposed to
volatile compounds.
Mayank Garg
Slide 12
BITS Pilani, Hyderabad Campus
13. PIEZO ELECTRIC SENSORS
A piezoelectric sensor is a device that uses the
piezoelectric effect to measure pressure, acceleration,
strain or force by converting them to an electrical signal,
they are configured as mass-change sensing device.
Mayank Garg
Slide 13
BITS Pilani, Hyderabad Campus
14. A) QCM SENSOR:
The QCM sensor consists of a resonating disk a few
millimeters in diameter, with metal electrodes on each
side connected to dead wise. The device resonate at a
characteristic frequency (10MHz to 30MHz) when excited
with an oscillating signal.
Mayank Garg
Slide 14
BITS Pilani, Hyderabad Campus
15. B) SAW Sensor:
• In SAW sensor a Surface
wave travels over the
surface of the device; not
throughout its volume.
• SAW sensors operate at
much higher frequencies,
and so can generate a larger
change in frequency.
Mayank Garg
Slide 15
BITS Pilani, Hyderabad Campus
16. MOSFET SENSORS
MOSFET odour sensing device are based on the principle that VOCs
in contact with a catalytic metal can produce a reaction in the metal
and the reaction’s products can diffuse through the gate of the
MOSFET to change the electrical properties of the device.
Mayank Garg
Slide 16
BITS Pilani, Hyderabad Campus