A pressure sensor can be mounted to an object with a pressure to be measured by a mounting structure. The printing ink comprises a compound having the following formula or together with a polycarbonate resin binder and a solvent for the same. The flanged cylinder has a higher permeability and saturation flux density than the flange piece, while the flange piece has a higher surface electrical resistance than the flanged cylinder. The support arm has a first end and a second end.