Patent ID: 8132464
Filing Date: 2012-03-13
Classification: G01F,G01L

Abstract:
1. A process variable transmitter for measuring a pressure of a process fluid, comprising: a process coupling having a first port configured to couple to a first process pressure and a second port configured to couple to a second process pressure; a differential pressure sensor coupled to the first and second ports having an output related to a differential pressure between the first pressure and the second pressure; first and second pressure sensors coupled to respective first and second ports having outputs related to the first and second pressures; and transmitter circuitry configured to provide a transmitter output based upon the output from the differential pressure sensor and further provide enhanced functionality based upon the first and second pressures; wherein the first and second pressure sensors comprise a brittle material having a cavity formed therein and wherein the outputs from the first and second pressure sensors are related to deformation of the cavity.