CA1084117A - Rf admittance measuring method and apparatus for determining the level of a conductive liquid - Google Patents

Rf admittance measuring method and apparatus for determining the level of a conductive liquid

Info

Publication number
CA1084117A
CA1084117A CA241,560A CA241560A CA1084117A CA 1084117 A CA1084117 A CA 1084117A CA 241560 A CA241560 A CA 241560A CA 1084117 A CA1084117 A CA 1084117A
Authority
CA
Canada
Prior art keywords
probe
electrode
conductive
guard
insulation
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
CA241,560A
Other languages
English (en)
French (fr)
Inventor
Robert J. Sun
Frederick L. Maltby
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.)
Drexelbrook Controls Inc
Original Assignee
Drexelbrook Controls Inc
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
Priority claimed from US05/532,208 external-priority patent/US4064753A/en
Application filed by Drexelbrook Controls Inc filed Critical Drexelbrook Controls Inc
Application granted granted Critical
Publication of CA1084117A publication Critical patent/CA1084117A/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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/002—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow wherein the flow is in an open channel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/68—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks
    • B29C70/685—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks by laminating inserts between two plastic films or plates
    • B29C70/687—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks by laminating inserts between two plastic films or plates the inserts being oriented, e.g. nets or meshes

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Electromagnetism (AREA)
  • Thermal Sciences (AREA)
  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
  • Measuring Volume Flow (AREA)
CA241,560A 1974-12-12 1975-12-11 Rf admittance measuring method and apparatus for determining the level of a conductive liquid Expired CA1084117A (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US532,208 1974-12-12
US05/532,208 US4064753A (en) 1974-12-12 1974-12-12 RF admittance measuring method and apparatus for determining the level of a conductive liquid
US63559575A 1975-11-28 1975-11-28
US635,595 1975-11-28

Publications (1)

Publication Number Publication Date
CA1084117A true CA1084117A (en) 1980-08-19

Family

ID=27063777

Family Applications (1)

Application Number Title Priority Date Filing Date
CA241,560A Expired CA1084117A (en) 1974-12-12 1975-12-11 Rf admittance measuring method and apparatus for determining the level of a conductive liquid

Country Status (4)

Country Link
JP (1) JPS5185759A (de)
CA (1) CA1084117A (de)
DE (2) DE2555817C2 (de)
GB (3) GB1545200A (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5337555U (de) * 1976-09-07 1978-04-01
JPH02109220U (de) * 1989-02-17 1990-08-31
DE8902858U1 (de) * 1989-03-06 1989-04-20 Berliner Wasser-Betriebe Eigenbetrieb von Berlin, 1000 Berlin Pegelmarke
DE4025400C1 (de) * 1990-08-10 1992-04-09 Vega Grieshaber Gmbh & Co, 7620 Wolfach, De
DE10210504A1 (de) * 2002-03-11 2003-09-25 Endress & Hauser Gmbh & Co Kg Feldgerätelektronik für konduktive Grenzstandschalter
DE202007019018U1 (de) * 2007-06-05 2010-05-12 Griebel, Herbert Sensor und damit ausgestatteter Abscheidebehälter

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2852937A (en) * 1955-04-07 1958-09-23 Honeywell Regulator Co Liquid level indicating apparatus
GB941645A (en) * 1961-03-28 1963-11-13 Dag Schreiber Improvements in or relating to flow measurement devices
US3324647A (en) * 1964-08-11 1967-06-13 Parmet Company Proximity detector
US3706980A (en) * 1970-04-27 1972-12-19 Drexelbrook Controls Rf system for measuring the level of materials
US3781672A (en) * 1971-05-10 1973-12-25 Drexelbrook Controls Continuous condition measuring system
DE7138801U (de) * 1971-10-13 1974-03-21 Endress & Hauser Gmbh & Co Kapazitives Füllstandsmeßgerät
US3729994A (en) * 1972-02-07 1973-05-01 H Klug Flow metering system for liquid wastes

Also Published As

Publication number Publication date
GB1545198A (en) 1979-05-02
GB1545200A (en) 1979-05-02
DE2555817A1 (de) 1976-06-24
GB1545199A (en) 1979-05-02
DE2555817C2 (de) 1986-04-17
DE2560645C2 (de) 1987-01-15
JPS5185759A (de) 1976-07-27

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Legal Events

Date Code Title Description
MKEX Expiry