Monitoring fluid condition with a spiral electrode configuration

A plug for insertion through the wall of a vessel filled with fluid to be monitored has an extension immersed in the fluid which has a pair of wire electrodes helically wound thereon in spaced arrangement. A thermistor is disposed on the extension for providing a fluid temperature signal. The electr...

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Bibliographische Detailangaben
Hauptverfasser:	ROBERT A. BAUER, MARK H. POLCZYNSKI, PAUL G. ROPS, MARTIN A. SEITZ, RICHARD W. HIRTHE
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING COMBUSTION ENGINES CONTROLLING COMBUSTION ENGINES HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES LIGHTING MEASURING MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUIDLEVEL MECHANICAL ENGINEERING METERING BY VOLUME PHYSICS TESTING WEAPONS
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Beschreibung
Zusammenfassung:	A plug for insertion through the wall of a vessel filled with fluid to be monitored has an extension immersed in the fluid which has a pair of wire electrodes helically wound thereon in spaced arrangement. A thermistor is disposed on the extension for providing a fluid temperature signal. The electrodes are excited sequentially by a low voltage at a fractional Hertzian (low) frequency and a Hertzian (high) frequency and the current and temperature are measured. The impedance and differential impedance are computed from the measured cunrents. From stored values of the differential impedance as a function of temperature for various known fluid conditions, the condition of the fluid is determined; and, if greater than a predetermined threshold, an alarm is activated and/or the fluid condition displayed.