Pressure transducers

Details Pressure transducers Pressure transducers

1978-07-31

1979-12-18

Woodiel, Donald O.

Measuring and testing

Fluid pressure gauge

Vibration type

G01L 1100

Patent

active

041788044

ABSTRACT:
A pressure transducer comprises two similar resonantly vibratable cylinders, one disposed coaxially inside the other and each having its own resonant vibration excitation system. A pressure P1 is applied to the inside of the inner cylinder and to the outside of the outer cylinder, while a pressure P2 is applied between the cylinders, whereby the difference in the respective vibration frequencies of the cylinders is dependent on the pressure difference P1-P2. Either P1 or P2 can be a reference pressure, e.g., a vacuum for an absolute pressure version of the transducer. Alternatively, either P1 or P2 can be atmospheric pressure, so that the transducer operates as a gauge pressure transducer.

REFERENCES:
patent: 3618360 (1971-11-01), Curtis

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