| 摘要 |
A pressure-difference pickup includes a hydraulic body ( 1 ), in which an overload chamber, with an overload membrane, or diaphragm, ( 13 ) is formed, which divides the overload chamber into a first half-chamber ( 2 ) and a second half-chamber ( 3 ), wherein the first half-chamber is in communication with a first hydraulic measuring path ( 8, 8 ') extending between a first pressure intermediary and a first side of a pressure-difference measuring cell, and the second half-chamber ( 2 ) is in communication with a second hydraulic path ( 9, 9' ) extending between a second pressure intermediary and a second side of the pressure measuring cell, and, wherein, additionally, between at least the first half-chamber ( 2 ) and the first hydraulic measuring path, there are arranged, on the one hand, a first hydraulic overload element ( 14 ) having a snap-disc behavior relative to an excess pressure from the first hydraulic measuring path ( 8, 8' ), and, on the other hand, a first hydraulic balancing path ( 16 ) extending parallel to the first hydraulic measuring path ( 8, 8' ). The hydraulic of the first hydraulic balancing path ( 16 ) is greater than path ( 8, 8' ).
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