Patent ID: 7484416
Filing Date: 2009-02-03
Classification: G01L,G05B

Abstract:
1. A transmitter for use in an industrial process control system, comprising: a process coupling configured to couple to a process fluid; a sensor housing having a cavity formed therein, the sensor housing cavity in fluidic communication with the process fluid through the process coupling; a diaphragm in the cavity configured to isolate a portion of the cavity from the process fluid and to move in response to pressure applied by the process fluid; a first electrode in the isolated portion of the cavity configured to form a first capacitance with the diaphragm; a second electrode in the isolated portion of the cavity configured to form a second capacitance with the diaphragm; and measurement circuitry coupled to the first and second capacitance configured to measure a pressure of the process fluid based upon at least one of the first capacitance and second capacitance, the measurement circuitry further configured to measure vibrations in the process fluid based upon at least one of the first capacitance and second capacitance.