Abstract: A pressure sensor for measuring high pressures, the sensor being adapted to act externally on a measuring element, the measuring element having a central cavity and being composed of two parts which are sealingly joined in order to form the cavity, and comprising sensor means for measuring the mechanical stress condition of the measuring element. The two parts of the measuring element are manufactured in planar technology form silicium or quartz and have a substantially larger length than lateral dimensions, the cavity being oriented in a longitudinal direction, and the sensor means being piezo-resistive elements lying adjacent to the external or internal surface of the measuring element.

Abstract: A method for filtering out particles from a fluid is disclosed, wherein unfiltered fluid is guided into a filter housing of a filter apparatus and filtered fluid is guided from the filter housing, and wherein a rotary filter element, which has a filter structure and is arranged in the filter housing and is rotatable about an axis thereof, is rotated at a speed which is sufficiently high that all particles passing in a fluid flow into the area of the rotary filter element are affected by its structure and are ejected therefrom, whereas the fluid passes the structure of the rotary filter element substantially freed from the particles and flows off from the filter housing.