On the performance evaluation of hybrid and mono-class sensor arrays in selective detection of VOCs: A comparative study

Detection of volatile organic compounds (VOCs) using non-selective sensor requires an array of multiplexed sensors followed by pattern recognition approach. Based on this concept, we compare three different approaches for selective detection of ethanol, ammonia, toluene, acetone and chloroform at different concentrations using non-selective sensors which are: (a) an array of sensors operated at a fixed temperature (hybrid class sensors), (b) operating one sensor at different temperatures (mono-class sensors), and (c) operating all sensors in an array at different temperatures ( i d r ©