Patent attributes
The pressure sensor of the invention, with an internal hydraulic system for pressure transfer, has a seal enabling an exact fill volume for the hydraulic system. The pressure sensor includes: a platform; at least one separating membrane, which, with the platform, encloses a pressure chamber; a hydraulic path inside the platform, which communicates with the pressure chamber; a platform blind hole in a surface of the platform, with, extending from the end of the platform blind hole, a canal, which communicates with the hydraulic path, wherein the diameter of the canal is smaller than the diameter of the platform blind hole, so that a first abutment surface is formed between the platform blind hole and the canal; a sealing element insertable into the platform blind hole and having a second abutment surface complementary to the first abutment surface and having a radially flexible, lateral surface; and an expander, which can be brought into engagement with the sealing element, in order to expand the lateral surface of the sealing element radially.
