MULTILAYER CONDUCTING POLYMER GAS SENSOR ARRAYS FOR OLFACTORY SENSING

Conductivity sensors using the conducting polymer poly(pyrrole) and it s derivatives have been prepared with a novel electrode design which a llows the probing of resistance changes within zones of a single senso r. It was found that the application of principal component analysis t o the sensor responses allowed methanol, ethanol and propanol to be di stinguished. The use of layered conducting polymers improved the discr imination of the sensor. A sensor consisting of four electrode pairs a nd two polymer layers is capable of separating the response of certain alcoholic beverages.