Patent ID: 7124641

Claim:
A capacitive pressure transmitter comprising: a capacitive pressure sensor including: a sensor body defining a chamber therein, the sensor body having a plurality of sensor inlets in fluidic communication with the chamber; a conductive deflectable diaphragm disposed in the chamber; at least one capacitive plate disposed in the chamber relative to the diaphragm such that diaphragm deflection generates a change in capacitance between the at least one plate and the diaphragm; and a non-conductive layer interposed between the at least one plate and the diaphragm; and a process media inlet operably coupled to one of the plurality of sensor inlets and adapted to couple to a source of process media to bring the process media into direct contact with the measuring diaphragm; a transmitter inlet operably coupled to the other of the plurality of sensor inlets; sensor circuitry coupled to the capacitive pressure sensor to generate a sensor signal based upon the capacitance of the capacitive pressure sensor; and transmitter circuitry coupled to the sensor circuitry to transmit information relative to the sensor signal over a process communication loop.