Piezoelectric high-pressure sensor

A piezoelectric high-pressure sensor for measuring a pressure of up to 10 kbar;

• the sensor comprising:
• a housing, a diaphragm and a measuring unit;
• wherein said housing is hollow-cylindrical in shape and comprises a shell that elongates along a longitudinal axis and a cavity, which shell is formed to include at least one mounting means, which is configured and disposed to permit the piezoelectric high-pressure sensor to be mounted at a measurement site;
• which measuring unit is arranged in the cavity and comprises at least one measuring element made of piezoelectric material;
• which diaphragm is disc-shaped and defines a central area and a peripheral area spaced radially from the central area, which diaphragm is configured to receive the pressure to be measured at the central area and to transmit the pressure along the longitudinal axis into the measuring unit, and which diaphragm is connected to the shell at the peripheral area by a bond between the shell and the peripheral area of the diaphragm;
• wherein the measuring element is rod-shaped and functions according to a piezoelectric transverse effect;
• wherein the measuring element has a length along the longitudinal axis and a cross-sectional area normal to the longitudinal axis;
• wherein a ratio of the length to the cross-sectional area is in a range from greater than or equal to 1.0 mm−1 to less than or equal to 1.5 mm−1;
• and
• wherein the shell has a diameter of less than or equal to 10 mm.