Patent ID: 7677106
Filing Date: 2010-03-16
Classification: G01L,G01M

Abstract:
1. A pressure sensor for sensing changes in pressure in an enclosed vessel, comprising: a first chamber having at least one expandable section therein that allows said first chamber to change in length; a reference member mounted within said first chamber, said reference member moving as a result of changes in length of said first chamber; a second chamber operatively associated with at least a portion of said first chamber, said second chamber having at least one expandable section therein that allows said second chamber to change in length in response to changes in pressure in the enclosed vessel, changes in length of the second chamber resulting in changes in length of said first chamber; and a sensor operatively associated with said reference member, said sensor sensing changes in position of said reference member, changes in position of said reference member being related to changes in pressure in the enclosed vessel.