Humidity effects on an environmental electronic nose for hydrocarbon gases

Abstract EN

An electronic nose system was built and tested for discriminating between some hydrocarbon gases in a gas mixture at different values of relative humidity.

The results show that each sensor has a separate response pattern to each gas used in the test, and that the relative humidity affects the behavior of the electronic nose system.

The feasibility of discriminating between gases in a gas mixture was demonstrated.

The effects of the ambient conditions, especially humidity, temperature and the concentration of oxygen gas inside the chamber, appear to affect the reproducibility of the system.

This results in a non-reproducible output of the sensors which makes it difficult to train the neural network program in order to discriminate between gases at a given value of relative humidity.