Capacitive liquid interface sensor

Details Capacitive liquid interface sensor Capacitive liquid interface sensor

1990-01-18

1991-05-07

Raevis, Robert

Measuring and testing

Sampler, sample handling, etc.

Capture device

73290R, B01L 302

Patent

active

050126830

ABSTRACT:
A capacitive sensor is described having an element which traverses the outside of a container of liquid to ascertain the vertical locations of liquid interfaces in the container. The sensor uses an oscillator whose amplitude or phase is a function of the capacitance of the element.

REFERENCES:
patent: 3391547 (1968-07-01), Kingston
patent: 3635094 (1972-01-01), Oberli
patent: 3939360 (1976-02-01), Jackson
patent: 4099167 (1978-07-01), Pomerantz et al.
patent: 4326851 (1982-04-01), Bello et al.
patent: 4635478 (1987-01-01), Hope
patent: 4736638 (1988-04-01), Okawa et al.
patent: 4818492 (1989-04-01), Shimuzu
patent: 4829837 (1989-05-01), Telfer
patent: 4873875 (1989-10-01), Cork

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