Pressure measuring device

摘要

The invention relates to a pressure measuring device with an inductive pick-off system (1), which consists of at least one electromagnetic coil (5, 6) and an armature (4), which can be displaced relative to the coil and is carried by a connecting part (12). Because of the different thermal expansion coefficients of the materials used for the components, measuring errors and fatigue of the joint between armature (4) and connecting part (12) can arise during temperature changes. These measuring errors brought about by temperature changes and the loading of the joint can be avoided in that the expansion coefficient of the material used for the armature (4) corresponds to the expansion coefficient of the material used for the connecting part (12). Pressure measurement and differential pressure measurement. <IMAGE>