The distance for transmission of the values might be in the range of 20 cm or more. Identification features of the transponder are not needed. Impedance values of the pressure sensors should be in the range of 50 - 120 pF. The components might have a prototype level, but should be working reliable to be integrated into an industrial demonstrator. At this stage of the project something like a handful of units are sufficient. Packaging solutions exist.
Any hints are welcome.