Patent ID: 7472608

Claim:
A pressure transmitter for use in industrial process control systems, the pressure transmitter comprising: a sensor module comprising: a differential pressure sensor for sensing a pressure differential in a process fluid; a base having a process fluid flow duct extending from a first side of the base through to a second side of the base for receiving the process fluid; a primary element positioned in the process fluid flow duct between the first side and the second side; first and second isolation diaphragm recesses positioned on a third side of the base facing away from the fluid flow duct: first and second impulse piping lines extending from the fluid flow duct on either side of the primary element, through the base, and to the first and second isolation diaphragm recesses, respectively; first and second fill fluid passageways extending from the first and second isolation diaphragm recesses, respectively, to the differential pressure sensor; and first and second isolation diaphragms positioned within the first and second isolation diaphragm recesses, respectively, to seal the first and second isolation diaphragm recesses from the first and second impulse piping lines, respectively; and a transmitter housing connected to the sensor module, the transmitter housing containing transmitter circuitry for processing output of the pressure sensor.