CA1035021A - Two-mode capacitive liquid level sensing system - Google Patents

Two-mode capacitive liquid level sensing system

Info

Publication number
CA1035021A
CA1035021A CA229,431A CA229431A CA1035021A CA 1035021 A CA1035021 A CA 1035021A CA 229431 A CA229431 A CA 229431A CA 1035021 A CA1035021 A CA 1035021A
Authority
CA
Canada
Prior art keywords
liquid level
sensing system
level sensing
capacitive liquid
mode capacitive
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
CA229,431A
Other languages
French (fr)
Inventor
Ronald F. Vogel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AGRIDUSTRIAL ELECTRONICS
Original Assignee
AGRIDUSTRIAL ELECTRONICS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by AGRIDUSTRIAL ELECTRONICS filed Critical AGRIDUSTRIAL ELECTRONICS
Application granted granted Critical
Publication of CA1035021A publication Critical patent/CA1035021A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
    • G01F23/26—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields
    • G01F23/263—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors
CA229,431A 1974-06-18 1975-06-16 Two-mode capacitive liquid level sensing system Expired CA1035021A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US480527A US3901079A (en) 1974-06-18 1974-06-18 Two-mode capacitive liquid level sensing system

Publications (1)

Publication Number Publication Date
CA1035021A true CA1035021A (en) 1978-07-18

Family

ID=23908301

Family Applications (1)

Application Number Title Priority Date Filing Date
CA229,431A Expired CA1035021A (en) 1974-06-18 1975-06-16 Two-mode capacitive liquid level sensing system

Country Status (2)

Country Link
US (1) US3901079A (en)
CA (1) CA1035021A (en)

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DE2617730C2 (en) * 1976-04-23 1982-04-29 Siemens AG, 1000 Berlin und 8000 München Device for monitoring the ink supply in ink writing devices
DE8216324U1 (en) * 1982-06-04 1982-09-23 Endress U. Hauser Gmbh U. Co, 7867 Maulburg PROBE FOR CAPACITIVE MEASUREMENT OF THE LEVEL IN A CONTAINER, ESPECIALLY OF HOT FUEL
US4686857A (en) * 1983-03-04 1987-08-18 Kabushiki Kaisha Toyota Chuo Kenkyusho Method and apparatus for evaluating the performance of dielectric substances
US4559507A (en) * 1983-09-01 1985-12-17 Simmonds Precision Products, Inc. Controlled hybrid microcircuit oscillator
CA2013372A1 (en) * 1989-04-05 1990-10-05 Berthold Koch Condensate trap for system under pressure
US5001927A (en) * 1989-09-25 1991-03-26 Teleflex Incorporated Full sensing unit
US5385110A (en) * 1990-09-07 1995-01-31 Bennett Marine, Incorporated Of Deerfield Beach Boat trim control and monitor system
US5365783A (en) * 1993-04-30 1994-11-22 Packard Instrument Company, Inc. Capacitive sensing system and technique
FR2777083B1 (en) * 1998-04-02 2000-05-19 Air Liquide PROBE FOR CAPACITIVE MEASUREMENT OF THE LEVEL OF A LIQUID AND RESERVOIR EQUIPPED WITH SUCH A PROBE
IT1310719B1 (en) * 1999-09-14 2002-02-22 Bitron Spa CAPACITIVE SENSOR DEVICE OF THE LEVEL OF A DIELECTRIC LIQUID
US6498566B1 (en) * 2000-08-10 2002-12-24 Delphi Technologies, Inc. Method for measuring fluid level
KR20030074673A (en) * 2000-12-20 2003-09-19 아버택스 리서치 앤드 디벨로프먼트 리미티드 Method and device for measuring levels
US6568264B2 (en) * 2001-02-23 2003-05-27 Charles E. Heger Wireless swimming pool water level system
US6546796B2 (en) * 2001-03-15 2003-04-15 Therm-O-Disc, Incorporated Liquid level sensor
US6857313B2 (en) * 2003-03-31 2005-02-22 Rochester Gauges, Inc. Self-calibrating capacitance gauge
US7726334B2 (en) * 2004-01-22 2010-06-01 Rochester Gauges, Inc. Service valve assembly having a stop-fill device and remote liquid level indicator
US7293578B2 (en) * 2004-01-22 2007-11-13 Rochester Gauges, Inc. Gauge assembly having a stop fill device
US7921873B2 (en) * 2004-01-22 2011-04-12 Rochester Gauges, Inc. Service valve assembly having a stop-fill device and a liquid level indicating dial
DE102004018630A1 (en) * 2004-04-16 2005-11-10 Pepperl + Fuchs Gmbh Device, sensor arrangement and method for the capacitive position detection of a target object
WO2006133357A2 (en) * 2005-06-08 2006-12-14 Lumenite Control Technology Inc. Self-calibrating liquid level transmitter
DE102007037364A1 (en) * 2007-08-08 2009-02-12 Robert Bosch Gmbh liquid sensor
US7690323B2 (en) 2007-10-31 2010-04-06 Rochester Gauges, Inc. Gauge head assembly with non-magnetic insert
US8410948B2 (en) * 2008-05-12 2013-04-02 John Vander Horst Recreational vehicle holding tank sensor probe
US7997132B2 (en) * 2008-06-09 2011-08-16 Rochester Gauges, Inc. Capacitive sensor assembly for determining relative position
US8161814B2 (en) * 2008-06-09 2012-04-24 Luna Labs, Inc. Self-calibrating capacitive transducer for determining level of fluent materials
US7963164B2 (en) * 2008-06-09 2011-06-21 Rochester Gauges, Inc. Capacitive sensor assembly for determining level of fluent materials
US9007075B2 (en) 2008-08-07 2015-04-14 Agency For Science, Technology And Research Contactless conductivity detector
WO2010092055A1 (en) * 2009-02-11 2010-08-19 Inergy Automotive Systems Research (Société Anonyme) Motionless liquid level gauge having three electrodes
CH702180B1 (en) * 2009-11-02 2015-02-13 Tecan Trading Ag Method for testing a laboratory device and corresponding laboratory device.
RU2445585C1 (en) * 2010-12-08 2012-03-20 Анатолий Александрович Анашкин Fuel level measuring device
DE102011053411B4 (en) * 2011-09-08 2016-04-21 Beko Technologies Gmbh Steam trap with fault monitoring
DE102011053407A1 (en) * 2011-09-08 2013-03-14 Beko Technologies Gmbh level monitoring
WO2013059565A1 (en) * 2011-10-19 2013-04-25 Schroeder Industries, Inc. Modular electronic carbonator fluid level control mechanism
GB2505190A (en) * 2012-08-21 2014-02-26 Schrader Electronics Ltd Level sensing in a vehicle fuel tank using electromagnetic fields
EP2735851B1 (en) * 2012-11-27 2020-04-22 Rechner Industrie-Elektronik GmbH Method and device for capacitive level measurement with cable probe or rod probe
US9518856B2 (en) * 2014-03-28 2016-12-13 Honeywell International Inc. Threaded coupling device with nozzle for GWR measurements in non-metallic tanks
BE1024491B1 (en) * 2016-08-11 2018-03-12 Safran Aero Boosters S.A. TURBOMACHINE OIL TANK WITH LEVEL MEASUREMENT
US11067607B2 (en) 2016-08-17 2021-07-20 KSR IP Holdings, LLC Sensing systems using current steering bridges
US10466090B2 (en) * 2016-08-17 2019-11-05 KSR IP Holdings, LLC Capacitive fluid level sensor for rapid response
DE102017127145B4 (en) * 2017-11-17 2021-03-04 BEDIA Motorentechnik GmbH & Co. KG Device and method for capacitive measurement of a fill level of a filling medium
WO2020171728A1 (en) * 2019-02-21 2020-08-27 Общество С Ограниченной Ответственностью "Омником Технологии" Capacitive interface level sensor

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US2724273A (en) * 1952-11-14 1955-11-22 Liquidometer Corp Liquid weight gauging apparatus
US3037165A (en) * 1957-05-30 1962-05-29 Goring Kerr Ltd Electrical indicating measuring or control apparatus and the like
US3170479A (en) * 1962-01-17 1965-02-23 Automatic Canteen Co Liquid level control apparatus
US3389602A (en) * 1964-04-20 1968-06-25 Industrial Nucleonics Corp Fuel gauging system for weightless tankages
US3543046A (en) * 1969-04-14 1970-11-24 Fisher Governor Co Capacitance-measuring techniques
US3665209A (en) * 1969-10-22 1972-05-23 T H Creears Corp Fluid level control system
US3771548A (en) * 1972-11-03 1973-11-13 G Rauchwerger Capacitive moisture control system having a peak detector

Also Published As

Publication number Publication date
US3901079A (en) 1975-08-26

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