Patent ID: 7559246
Filing Date: 2009-07-14
Classification: G01L

Abstract:
1. A sensor for measuring low dynamic pressure in the presence of high static pressure comprising: a diaphragm having first and second oppositely disposed surfaces, said diaphragm deflecting according to the magnitude of an applied pressure comprising a low dynamic pressure in the presence of a high static pressure, wherein said first surface receives said applied pressure; at least one pressure sensing element located on said diaphragm and operative to provide an output signal substantially proportional to said applied pressure; and a tube member having length L and an inlet and an outlet, said outlet of said tube member opening to said second surface of said diaphragm, and said inlet of said tube member receiving said low dynamic pressure as well as said high static pressure, wherein said tube member filters out said low dynamic pressure with frequencies above the resonant frequency of said tube, while allowing said high static pressure to pass through to said second surface, wherein said sensor provides an output substantially proportional to said low dynamic pressure.