**2. Conclusions**

Nanostructured semiconducting materials are the most promising materials for study of sensors because of their much surface to volume ratio. We have been interested in carrying out our investigations with a new material that possess good sensitivity for the LPG concentration at the LEL level, with properties that are stable over time and thermal cycling after exposure to the various species likely to be present in the ambient. Titania show very good surface reactivity and they have temperature dependent surface morphology. In this chapter, thorough experimental investigation was carried out in order to develop electrical type LPG sensor using thin films of nanosized Titania with some other additives material.
