Electronic Nose Technology and Application: A Review

In this paper, the researchers intended to review the electronic nose. E-nose is a technology that has the capability to recognize odor and it mimics the human nose. Using Optical Sensor System, Mass Spectrometry, Ion Mobility Spectrometry, Gas Chromatography, and Infrared Spectroscopy are the different technologies in electronic nose. Metal-oxide, Photoionization detector, Catalytic bead sensors, Electrochemical gas, Acoustic wave, Optical, Quartz crystal microbalance, and Conducting polymer are the sensors that have a significant part in detecting the chemicals or odors. With the use of computational intelligence such as Principal Component Analysis, Support Vector Machine, Artificial Neural Network, and Pattern Recognition, are some of the algorithms that are incorporated in the electronic nose. Using artificial intelligence in the electronic nose, the detection, classification, and prediction is easier and has a higher accuracy rate. The electronic nose has many applications. Food Industry, Environmental Monitoring, Disease Diagnosis, and Safety and Security are some fields where the application of an electronic nose is feasible. There is no doubt that with continuous research and developing electronic noses this technology will be part of our life that can help the society.