Abstract: A rugged electronic pressure scanner which is capable of withstanding extreme environmental conditions is provided with a transducer per port configuration. Internal multiplexing, amplification and integral calibration valve permit on-line calibrations. The construction of a plurality of individual transducer modules each containing its own electronics permits field replacement of individual pressure transducer modules in the event of destruction or inoperativeness.

Abstract: A vibrating cylinder pressure transducer system with an incorporated error correction circuitry is disclosed. The compensation circuitry includes a microcomputer, a frequency counting circuit and a arithmetic processor. The system further provides for digital temperature measurement and compensation. The characterizing equation of the vibrating transducer is solved by the microcomputer and the arithmetic processor in order to provide a thermal compensated, highly accurate digital output indication of the measurement of pressure in a single self-contained unit which is small in size and which provides a direct engineering unit output thereby eliminating the need for a further and separate dedicated computer in order to obtain pressure measurements.