Device for detecting a defined filling level of a medium in...

Details Device for detecting a defined filling level of a medium in... Device for detecting a defined filling level of a medium in...

2007-12-04

2007-12-04

Goins, Davetta W. (Department: 2612)

Communications: electrical

Condition responsive indicating system

Specific condition

C340S618000, C340S620000, C073S29000R, C073S307000, C073S30400R

Reexamination Certificate

active

10509334

ABSTRACT:
An apparatus for detecting a predefined fill level of a medium in a container having a lid by means of a conductive measuring system, which has at least two measuring electrodes extending into the container. A measurement current flowing between the two measuring electrodes is used to detect the reaching of the predefined fill level. The apparatus makes possible a differentiated detection of accretions on the lid of the container. According to one variant of the invention this is achieved by providing a compensation electrode, which is arranged such that the degree of fouling in the region of the lid of the container is determined on the basis of a current flowing between one of the measuring electrodes and the compensation electrode, caused by conductive accretions in the lid of the container.

REFERENCES:
patent: 4182363 (1980-01-01), Fuller
patent: 4879902 (1989-11-01), Loniello
patent: 5534708 (1996-07-01), Ellinger et al.
patent: 5898374 (1999-04-01), Schepka
patent: 5901740 (1999-05-01), Sanchelima
patent: 5923102 (1999-07-01), Koenig et al.
patent: 6095178 (2000-08-01), Gilbert et al.

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