Various embodiments described herein relate to apparatuses and methods associated with fluid pressure sensor systems and sealing members for the same. The sensing apparatus can include a sensor (312) disposed on a substrate (310) and an engagement member including a generally columnar sealing member (314) configured to engage an inner cylindrical surface of a receiving tube (322) within the housing (320) connected to the substrate about the sensor. The sealing member can define an axial bore extending from a proximal end to a distal end, and one or more media can be disposed in the axial bore such that the sensor can detect a force applied to the media. The sealing member can include an outer sealing surface defining one or more engaging elements (3147, 3151) extending circumferentially about the sealing member, the one or more engaging elements configured to non-adhesively engage the inner cylindrical surface of the receiving tube to resist removal of the sensor assembly.
