Pressure transducer

Details Pressure transducer Pressure transducer

1983-02-28

1984-07-31

Woodiel, Donald O.

Measuring and testing

Fluid pressure gauge

U-tube liquid column

361283, G01L 912

Patent

active

044622597

ABSTRACT:
A pressure transducer of the manometer type comprises two interconnected columns of liquid with means for applying differential pressure across the columns. The liquid is a magnetic liquid and a magnetic field is impressed on the columns to attract the liquid by magnetic force to a reference position. The applied differential pressure acts counter to the magnetic force to shift the columns so that their difference in lengths reflects the pressure. By using capacitor plates to define the walls for the liquid columns and a magnetic liquid which is a dielectric, the capacitance between the plates is a function of the column lengths and therefore is a function of the applied differential pressure.

REFERENCES:
patent: 2703876 (1955-03-01), Edmundson
patent: 3190122 (1965-06-01), Edwards
patent: 4423638 (1984-01-01), Tward

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