Abstract
The use of sensor arrays for the improvement of the selectivity of chemical sensors has become common. Generally, however, the properties of the single sensor elements are not exactly defined with respect to other values within the array; they are generally designed to be non-selective but different. This paper described a method for evaluating the contribution of a single sensor element to the selectivity for a given class of substances. The advantage of this design method is the possibility to use data from known substances (e.g., the catalogues on gas chromatography substances) to design a sensor array with optimal selectivity. An example of a piezoelectric quartz sensor array is presented to illustrate this design method.
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