Method and a device for capacitive level measurement

Details Method and a device for capacitive level measurement Method and a device for capacitive level measurement

1975-06-10

1977-01-18

Woodiel, Donald O.

Measuring and testing

Liquid level or depth gauge

Immersible electrode type

317246, G01F 2326

Patent

active

040032590

ABSTRACT:
Capacitive level measurement apparatus comprising two sets of interdigitated capacitive elements arranged along the vertical direction for immersion in a liquid or the like, and a switch arrangement with external connections which provide sequential measurement of the electrical capacity between successive pairs of adjacent capacitive elements, from which information the level of the liquid is determined. Preferably the switches are inside an assembly of the capacitive elements, and special means are preferably used to effect the desired sequential switch actuation.

REFERENCES:
patent: 2511398 (1950-06-01), Giers et al.
patent: 3443438 (1969-05-01), Martin et al.
patent: 3473381 (1969-10-01), Allen
patent: 3505869 (1970-04-01), Crawford
patent: 3646293 (1972-02-01), Howard

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