Patent ID: 7526962
Filing Date: 2009-05-05
Classification: G01L

Abstract:
1. A high pressure transducer for measuring a differential pressure between a main input pressure and a reference pressure, said transducer having a metal housing, said housing having welded seams which undesirably experience high stresses in the presence of high pressures, comprising: a) a pressure transducer housing having an internal hollow and having a first inlet main pressure port at one end and an inlet reference pressure port at an opposite end; b) a first header position within hollow having at least one first sensor device located on said header with said sensor communicating with said inlet main pressure port, said sensor positioned on said first header to receive only said main pressure, with a welded seam between said first header and said housing; c) a second header positioned in said hollow having at least one second sensor device located on said second header with said sensor communicating with said inlet reference port, said sensor positioned on said second header to receive only said reference pressure, said housing having a second main high pressure port located between said ends and communicating with said hollow whereby when a high pressure is applied to said second high pressure port, the weld of said housing as positioned between said housings and said first header is subjected to an equal pressure on both sides, namely, the main inlet pressure subtracted from the pressure applied to said second main high pressure port and whereby the weld associated with the second header is only subjected to the difference between the main pressure and the reference pressure.