Techniques to Optimize the Selectivity of a Gas Sensor

The efficient use of a gas sensor is related with its characteristics of performance and its efficient design. In this paper, a set of techniques with the aim of optimizing the selectivity of a sensor gas to a particular gas or a set of gases is presented. Gas sensors based on micro and nano technology using the principle of the change of electrical resistance are specifically analyzed. The design considerations are given for each technique proposed and some characteristics in respect to their performance are established.