Patent ID: 11913856
Assignee: ATEQ
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A differential pressure sensor for a leak detection device comprising:
at least two bodies fastened to each other in which a cavity is created;
a membrane that is arranged between the two bodies and separates said cavity so as to define a test chamber in each one of said bodies;
at least one electrode arranged in each one of the test chambers and facing said membrane so as to form therewith a capacitor;
wherein said sensor comprises at least a first pair of seals and a second pair of seals arranged between each of said bodies and the membrane to ensure a tightness of each of the test chambers; and
wherein each of the bodies comprises at least one fluid duct, opening between the seals of one of said pairs of seals, each duct allowing a pressure prevailing between a respective pair of seals to vary and to balance the pressure prevailing between the respective pair of seals with the pressure prevailing in the respective test chamber.