Patent ID: 6782754
Filing Date: 2004-08-31
Classification: G01L

Abstract:
A pressure transmitter for a clean environment, the pressure transmitter comprising:a process coupling coupleable to a source of process fluid; a pressure sensor module coupled to the process coupling for fluidic communication with the process fluid, the pressure sensor module having an electrical characteristic that varies with process fluid pressure; measurement circuitry operably coupled to the pressure sensor module, the measurement circuitry being adapted to provide a signal based upon at least one measurement of the electrical characteristic; communication circuitry coupled to the measurement circuitry and adapted to provide pressure-related information to a process control loop; and wherein the pressure sensor module further includes: an isolator diaphragm positioned to contact the process fluid; a deflectable sensor diaphragm pressure sensor disposed within the pressure sensor module; and filler material disposed between the isolator diaphragm and the sensor diaphragm, wherein the filler material is constructed from an elastomer.