Patent ID: 7597004

Claim:
A differential pressure transducer having a sensor and for providing an output proportional to the difference between a main pressure P 1 and a reference pressure P 2 , wherein one of the pressure inputs contains an undesirable varying pressure fluctuation which fluctuation can undesirably produce excessive stress on said sensor, comprising: said sensor having a deflectable diaphragm, said diaphragm having pressure sensing elements on said diaphragm which elements provide an output proportional to an applied pressure on said diaphragm; a first port communicating with one surface of said diaphragm to provide a first pressure thereto; a second port communicating with the other surface of said diaphragm to provide a second pressure thereto, a coiled tube in series with one of said ports and dimensioned to suppress said varying pressure fluctuation prior to the application of said associated pressure to said diaphragm.