Industrial environments require precise air humidity control for the well-being of individuals, product storage and the adequate functioning of machineries. The latter goal, focus of experimental and theoretical activities of this thesis, presents critical issues especially when pressurized air plays an active role. In pneumatic circuits, where pressurized air runs in conducts and components, humidity and the consequent water condensation are responsible for rust and damage of pipes, moving parts and components like valves, flowmeters, motors. In addition, water drops formation affects the final product quality of industrial manufacturing processes. The reduction of the condensation risks can involve passive and active solutions.