Dr. Khaled Hussein

Eng. Haytham Metawie

Ahmed Hany

Ahmed Ehab

Omar Sherif

Omar Saeed

Publishing Date



An E-nose is a collection of gas or chemical sensors that mimic the human nose. When compared to standard detection approaches, the e-nose has demonstrated tremendous potential and value in enhancing assessments of food quality parameters. Because of the COVID-19 outbreak, more light has been thrown on this device recently. The purpose of this paper is to suggest a new system that detects gas leaks, smoke or early fires, spoiled and rotten foods, dangerous chemicals and acts as an Air-Quality Control System. Using an array of gas sensors, as well as a motion sensor each of which distinguishes a certain fragrance or has distinct functionality. The analog pins of these sensors are linked to the Arduino-Uno pins, which convey the signals to an ADC module. Furthermore, in order to handle this data, it must go through two phases: a pre-processing phase and feature selection, followed by a processing phase to conclude the data processing, categorize odors and identify movement. Finally, the system is integrated with an Android application to send alerts whenever an abnormal gas behaviour is detected.

1.1 Background

The sense of smell is one of the most crucial senses God has gifted us with, without it we would suffer from tragic fatalities. Unfortunately, some people have lost that sense temporarily due to the coronavirus; but there are others who fully lost their sense of smell, those people were diagnosed with Anosmia. Anosmia is failing to sense any kind of scents, either fully or partially. Anosmia is most commonly caused by COVID-19, flu, hay fever, tumor, diabetes, and many more diseases. Some patients regained their sense of smell after recovering from COVID-19. A study was approved by the ethics committee of the University Hospitals of Strasbourg around 97 patients. Most of them partially recovered, as well as others who never recovered.

1.2 Motivation


This project addresses different fields where E-nose could be a beneficial device. The most important field is assisting anosmic people to overcome difficulties they face with no sense of smell. Such an important field was not addressed by applications or papers. The second field is Smart-Planting within the agriculture field, by detecting ripeness levels of fruits and vegetables. This field always had a limited number of testing samples. The third field is the Medical-field, some diseases could be detected using gases emitted from the brain or found in the urine. Diseases covered within this field were only limited to azotemia [4] and schizophrenia.


Anosmic patients, landowners, doctors as well as public places can all benefit from the E-Nose (Electronic-Nose) device. The E-Nose can detect multiple gases at the same time. Anosmic people and public places, for instance, could utilize it to detect gas leakage or harmful chemicals. Landowners could use it to detect overripe fruits. Doctors could use it in urinalysis to detect azotemia, or in the Psychological field to detect schizophrenia. Such a device is needed in the market and will be used in various sectors to prevent numerous accidents.

1.3 Problem Statement

Anosmic people failing to sense any kind of scents surely leads to undesirable events. Failing to detect gas leaks or harmful chemicals is considered a threat to their well-being. However, We are in a world where anosmic patients’ numbers gradually increase due to the COVID-19 Pandemic. Hence, the E-nose proposed system could come in handy.