Relative pressure sensor

Details Relative pressure sensor Relative pressure sensor

G - Physics

01

L

G01L 7/20 (2006.01) G01L 7/06 (2006.01) G01L 9/00 (2006.01) G01L 13/02 (2006.01)

Patent

CA 2313313

A relative-pressure sensor is provided which is protected against contaminants and/or moisture and manages without an oil filling, having a gas-filled measuring chamber (5), which is sealed with a pressure-sensitive measuring diaphragm (3), on the outside of which a pressure (P) to be measured acts during operation, a gas-filled compressible resilient bellows (17, 18), on which a reference pressure (R) acts from outside during operation, whose internal volume depends on the reference pressure (R), and which is connected to the measuring chamber (5) in order to adapt an internal pressure prevailing in the measuring chamber (5) to the reference pressure (R), and a transducer for converting a pressure-dependent deflection of the measuring diaphragm (3) into an electric measured variable.

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