Hi Firas, I think the issue with pressure sensors, is more "what is the best method of measuring pressure" then how can I implement it with the materials available. As most methods rely on some physical changes in the device to do the measuring, such as thermal conductivity, capacitance, change in density etc. and each has its optimal pressure regime. Perhaps the simplest to implement would be the type used for weigh scales where deflection of a material (often a thin film deposit of metallic islands) or for pressure a membrane, is seen as a change in resistance.