Temperature compensated pressure signal generator

Abstract

A differential pressure signal generator uses a pressure sensor arranged to sense differential pressure between a pair of right and left pressure measuring chambers in right and left portions of a signal generator body to which high and low pressure-side measured pressures are applied through respective barrier diaphragms and a center diaphragm arranged to define right and left pressure measuring chambers with the center diaphragm providing a pressure coupling to a fill fluid contacting the pressure sensor and being made of a material having a larger thermal expansion coefficient than the right and left portions of the generator body to provide an ambient temperature compensation by absorbing temperature induced volume changes in the full fluid. The temperature compensation is also applicable to an absolute pressure signal generator using a diaphragm to transmit a measured pressure to a sensor located within a body of the signal generator.

Dependencies are inferred from the claim text.