Abstract: Electronic nose (e-nose) is an electronic system of bionic olfaction. The concept of electronic nose was formally proposed in review articles published by Gardner in 1994. Electronic nose has been widely studied and applied in many areas, including food industry, tobacco industry, Chinese medicine industry, medical industry, environmental monitoring and military field, and been presented its unique characteristic nowadays. This paper introduces the concept, the working principle and applications of e-nose.

Key words: electronic nose, bionic olfaction, gas sensor