2. PRESENTED BY S.VENKTESWARLU

3.  Over the last decade, "electronic sensing" or “E-sensing" technologies have undergone important developments from a technical and commercial point of view  The First idea for E- sensing comes on 1914  Since 1982 research has been conducted to develop E-sensing technologies

4. Different existing gas detection methods such as  Gas chromatography (GC)  Mass spectrometry (MS)  GC-MS Method  Ion mobility spectrometry (IMS) etc

6.  Human Senses were replaced by E-senses such as  EYE-------> Camera  Hear------> Microphone  Touch-----> Thermometer  Taste -----> E-Tongue  Smell-----> E-Nose

7. Human olfactory systems have large numbers of organs in the (10 Millions for humans, 100 Millions dog). There are 1000 different organs (We smell in 1000 different “odor”).

9.  Works on non seperative mechanism  Each odour has its unique identification as same as finger print  No two odours have same properties  By this we can analyze the flavour

10.  The major three components of E-nose are 1. Sampling Deliver system 2.Detection System 3.Computing system

11.  The sample delivery system enables the generation of the volatile compounds  The system then injects this headspace into the detection system of the electronic nose.

12.  It consists of a sensor set to react  It is the "reactive" part of the instrument  The sensors react when odour detects  which means the sensors experience a change of electrical properties.

13.  Here MOSFET used to amplify the signals  Change in odour leads to change in sensor electrical property (either positive or negative)  This change directly given to the MOSFET to amplify the signal

14.  It is used to match the recognised pattern with predefined patterns and give appropriate results

16. A few applications of E-Nose are  Medical Diagnostics  Food Processing Industries  Explosive Detection  Chemical Research Laboratories  Quality Control Laboratories etc

17.  Some types of Cancer detection such as lung cancer  Harmful Bacteria detection

18.  High cost  Low range application area  Complex city in matching odour patterns

19.  E-Nose is one of the major invention which can capable to sense the human senses  It can help the modern world to solve many problems and save more valuable lives.  This is not a device which completely replace the human sense but most of cases it is possible.