Differential pressure pickup

A differential pressure pickup, comprising:

• a sensor element;
• a first and a second pressure measuring chamber, respectively adjacent to said sensor element;
• first and second separating diaphragms;
• a first pressure receiving chamber, closed off by said first separating diaphragm;
• a second pressure receiving chamber, closed off by said second separating diaphragm;
• first, second, third and fourth conduits;
• a first overload chamber, connected to said first pressure receiving chamber by said first conduit, and to said first pressure measuring chamber by said second conduit;
• a second overload chamber, connected to said second pressure receiving chamber by said third conduit and to said second pressure measuring chamber by said fourth conduit;
• a liquid filling said first and second pressure receiving chambers, said first and second overload chambers, said first and second pressure measuring chambers and also said first, second, third and fourth conduits;
• and
• an overload diaphragm, by which the first and second overload chambers are separated from each other, wherein:
• said overload diaphragm comprises an annular diaphragm with an outer edge and an inner edge, said overload diaphragm being firmly restrained along its outer edge and its inner edge.