The submersible pressure transmitter, sometimes also referred to as a level probe, is a special type of pressure sensor used for level measurements in e.g. tanks, wells, shafts and bore holes. For level measurements, the level probe is submersed directly into the …
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Pressure sensor principles – a comparison
Sabine Mai | PressureThere is no “ideal” sensor principle. Of particularly great importance and widespread use are resistive sensor technologies, due to their reliability. For electronic pressure sensors, WIKA is using metal thin-film and piezo-resistive sensors. Each of the two …
Difference of 4-20 mA in 2-wire and 3-wire technology in pressure sensors
Michèle Beyer | PressureWhat exactly is the difference between the 4-20 mA output signal in 2- and 3-wire technology? This question is answered best from the viewpoint of the user: An output signal in 2-wire technology means: less wiring required better EMC protection, since …
Accuracy of pressure sensors – what ”precisely” does this mean?
Sabine Mai | PressureHow is the accuracy of pressure sensors actually defined? The deviation of the actual characteristic curve from the ideal one is often referred to as “accuracy”. However, the term itself cannot be found in any national or international standard. This means that …
Autofrettage in pressure sensors ensures zero-point stability
Eugen Gaßmann | PressureIn the manufacturing operation of pressure sensors, autofrettage denotes the process of active "overload" by subjecting the pressure sensor selectively once or several times to a pressure above the nominal pressure range . This process is applied, in order to achieve …




