Redundant level measuring system
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United States of America Patent
Stats
-
Jul 8, 2003
Grant Date -
Feb 27, 2003
app pub date -
Aug 21, 2001
filing date -
Aug 21, 2001
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A redundant level measuring system comprises a chamber for fluidic coupling to a process vessel whereby material level in the vessel equalizes with material level in the chamber. A float including a magnet in the chamber rises and falls with material level in the chamber. A magnet actuated visual indicator is mounted to the chamber for indicating level of the magnet in the chamber. A measurement instrument includes a probe and a measurement circuit. The instrument is mounted atop the chamber with the probe extending downwardly into the chamber. The measurement circuit measures a characteristic of the probe representing level of the material in the chamber. A shield in the chamber isolate the float from the probe.
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