Chemical sensors are being developed for a large variety of applications. Medical diagnosis, industrial process control and environmental monitoring are important application fields but chemical sensors will have an impact in other areas as well. The author discusses some application fields and overviews most of the types of chemical sensors which are used or developed at present. It also describes how the nervous system in a living body contains a number of different chemical sensors. Even though one still does not fully understand the physical mechanisms behind nerve excitation there is inspiration to be gained from studying how natural sensors operate.
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C. Nylander (1985) studied this question.