Pressure transfer device for e.g. differential pressure sensor, has fluid buffers with filling material chambers that communicate with hydraulic path, where materials have negative volume expansion coefficients

摘要

The device has a hydraulic path extending between a pressure inlet and a pressure receiver in a pressure resistant arrangement. Fluid buffers (7-9) are provided with filling material chambers (10, 12, 14)) that interact with the hydraulic path. The hydraulic path runs through the chamber. Filling materials (11) are accommodated in the filling material chambers and have negative volume expansion coefficients. Independent claims are also included for the following: (A) an absolute pressure sensor or relative pressure sensor with pressure transfer device (B) a differential pressure sensor with a pressure transfer device.