Rf admittance measuring method and apparatus for determining...

Details Rf admittance measuring method and apparatus for determining... Rf admittance measuring method and apparatus for determining...

G - Physics

01

F

324/74.2

G01F 23/28 (2006.01) G01F 1/00 (2006.01) G01F 23/26 (2006.01)

Patent

CA 1084117

Abstract of the Disclosure Various probes which are adapted to measure the liquid level in a vessel including the flow rate through a channel comprise a conductive probe electrode and a guard electrode including a rear portion located between the wall of the vessel and the probe electrode and a lateral portion extend- ing outwardly from the lateral extremities of the probe electrode. The probe electrode and the guard electrode are separated by interior solid insulation and an exterior solid insulation covers the probe so as to separate the guard electrode and the probe electrode from the conductive liquid. By driving the guard electrode at substantially the same potential as the probe electrode, the portion of a conductive coating which has accumulated at the lateral portions of the guard electrode may be capacitive- ly coupled to the potential of the guard electrode thereby reducing the adverse effect of a conductive coating which has accumulated at the probe electrode.

241560

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