Differential pressure measuring sensor with overload protection

A differential pressure transducer with overload protection, comprising:

• a measuring element body;
• a first separating diaphragm;
• a second separating diaphragm;
• a first overload diaphragm;
• a second overload diaphragm;
• a differential pressure transducer for converting a pressure difference into an electrical signal;
• a first hydraulic path;
• and
• a second hydraulic path;
• wherein the first overload diaphragm is connected to the measuring element body to form a first overload chamber with variable volume along a circumferential first overload diaphragm edge;
• wherein the second overload diaphragm is connected to the measuring element body to form a second overload chamber with variable volume along a circumferential second overload diaphragm edge;
• wherein the first separating diaphragm is connected to the measuring element body to form a first separating diaphragm chamber along a circumferential first separating diaphragm edge,
• wherein the first overload diaphragm is enclosed between the measuring element body and the first separating diaphragm;
• wherein the second separating diaphragm is connected to the measuring element body to form a second separating diaphragm chamber along a circumferential second separating diaphragm edge,
• wherein the second overload diaphragm is enclosed between the measuring element body and the second separating diaphragm;
• wherein the first separating diaphragm chamber is hydraulically connected to the second overload chamber via the first hydraulic path, which extends at least in sections through the measuring element body;
• wherein the second separating diaphragm chamber is hydraulically connected to the first overload chamber via the second hydraulic path, which extends at least in sections through the measuring element body;
• wherein the differential pressure transducer is hydraulically connected to the first separating diaphragm chamber and the second separating diaphragm chamber;
• wherein the first overload diaphragm has a first base surface, which faces a first mating surface in the first overload chamber;
• wherein the second overload diaphragm has a second base surface, which faces a second mating surface in the second overload chamber;
• wherein the first overload diaphragm is pre-stressed against the first mating surface in the operable state at pressure equilibrium, such that the first base surface rests against the first mating surface at least in sections;
• wherein the second overload diaphragm is pre-stressed against the second mating surface, such that the second base surface rests against the second mating surface at least in sections;
• wherein the first overload diaphragm has a radially variable first material thickness h(r);
• and
• wherein the second overload diaphragm has a radially variable first material thickness h(r).