Capacitive fluid sensor

Details Capacitive fluid sensor Capacitive fluid sensor

1989-01-30

1990-07-03

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Lumped type parameters

324686, 324663, G01N 2722

Patent

active

049394681

ABSTRACT:
To increase the sealing effect with increasing fluid pressure in a capacitive fluid sensor for sensing a dielectric constant of fluid, the sensor comprises a sensor housing, a fluid outlet pipe connected midway in the sensor housing, an internal electrode, a first cylindrical insulating internal electrode support member disposed within the sensor housing between the fluid outlet pipe and a sensor housing end, and a sealing member disposed between the first cylindrical support member and sensor housing end. It is preferable to dispose a second flat insulating internal electrode support member formed with a central annular portion and plural arms extending from the annular portion so as to be fitted to a swollen-out portion of the sensor housing to reduce fluid resistance.

REFERENCES:
patent: 1483225 (1924-02-01), Hammett
patent: 1511765 (1924-10-01), Latham
patent: 1585255 (1926-05-01), McFadden
patent: 3025464 (1962-03-01), Bond
patent: 3133437 (1964-05-01), Remke
patent: 3314005 (1967-04-01), Whitener
patent: 4774680 (1988-09-01), Agar
patent: 4809129 (1989-02-01), Hansen

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