Absolute pressure sensors
The absolute pressure sensor is a pressure measuring device with which the absolute pressure can be measured. There is a vacuum on the secondary side of the diaphragm. The reference point of the absolute pressure sensor corresponds to the full vacuum.
the complete vacuum.
Relative pressure sensors
The relative pressure sensor is a pressure measuring device with which the relative or differential pressure can be measured. The secondary side of the diaphragm is open, so that a pressure compensation to the atmospheric pressure can take place. The zero point
of the pressure sensor corresponds to the ambient pressure.
Ceramic thick-film technology
The basic body consists of a ceramic monolyte on whose membrane the resistors are printed. Ceramic sensing elements are characterized by good long-term stability and corrosion resistance. Since ceramics cannot be welded to the process connection, a seal is required for media separation.
In the ceramic thick film, four resistors are interconnected to form a Wheatstone bridge. In the center of the diaphragm, the resistors experience the highest elongation under pressurization, and in the edge areas the greatest compression. In ceramic cells, the measuring diaphragm is also the separating diaphragm to the medium. No internal transmission fluid is required.