Measuring and testing – Liquid level or depth gauge – Immersible electrode type
Reexamination Certificate
2011-06-21
2011-06-21
Rogers, David A. (Department: 2856)
Measuring and testing
Liquid level or depth gauge
Immersible electrode type
C073S29000R, C073S29000R, C073S30400R
Reexamination Certificate
active
07963164
ABSTRACT:
A capacitive sensor assembly for measuring a level of fluent material in a container includes an electronics section for receiving and processing signals and an antenna probe operably associated with the electronics section. The antenna probe has an electrical conductor and an insulating layer that covers at least a portion of the electrical conductor. The electrical conductor is connected to the electronics section. An enlarged measurement portion is in turn connected to the electrical conductor for detecting the presence or absence of the fluent material. The enlarged measurement portion has a surface area that is larger than a surface area of the electrical conductor over an equivalent height or length to function as a first plate of the capacitive sensor assembly, with the fluent material to be measured functioning as a second capacitive plate. In this manner, a change in detected capacitance of the antenna probe is reflective of a level condition of the fluent material.
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Farmanyan Gagik
Ross, Jr. Herbert G.
Rochester Gauges, Inc.
Rogers David A.
Wirthlin Alvin R.
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