Patent ID: 6640640
Filing Date: 2003-11-04
Classification: G01L

Abstract:
A differential pressure sensor comprising:a rigid carrier plate arranged between first and second diaphragm plates, said carrier plate having congruent concave depressions on opposite sides of said carrier plate; a central duct penetrating said carrier plate perpendicularly to the plane of said first and second diaphragm plates, said duct connecting said depressions to each other; first and second measuring chambers, each of said chambers limited by said carrier plate and an associated one of said first and said second diaphragm plates; said first and said second diaphragm plates in the region of said associated one of said first and said second measuring chambers are each formed congruently as pressure sensitive measuring diaphragms in relation to an associated one of concave depressions in said carrier plate; and a ram guided axially movable in said duct coupling said pressure sensitive measuring diaphragms to each other.