FR2360873A1 - Measurement of liq. level in container - uses float with magnetic follower in gas filled tube defining end point of measured optical path - Google Patents

Measurement of liq. level in container - uses float with magnetic follower in gas filled tube defining end point of measured optical path

Info

Publication number
FR2360873A1
FR2360873A1 FR7623741A FR7623741A FR2360873A1 FR 2360873 A1 FR2360873 A1 FR 2360873A1 FR 7623741 A FR7623741 A FR 7623741A FR 7623741 A FR7623741 A FR 7623741A FR 2360873 A1 FR2360873 A1 FR 2360873A1
Authority
FR
France
Prior art keywords
container
level
gas filled
liq
measurement
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.)
Pending
Application number
FR7623741A
Other languages
French (fr)
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.)
ITO PATENT AG
Original Assignee
ITO PATENT AG
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 ITO PATENT AG filed Critical ITO PATENT AG
Priority to FR7623741A priority Critical patent/FR2360873A1/en
Publication of FR2360873A1 publication Critical patent/FR2360873A1/en
Pending 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
    • G01F23/30—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 floats
    • 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
    • G01F23/28—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 the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
    • G01F23/284—Electromagnetic waves
    • G01F23/292—Light, e.g. infrared or ultraviolet
    • 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
    • G01F23/30—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 floats
    • G01F23/64—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 floats of the free float type without mechanical transmission elements
    • G01F23/68—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 floats of the free float type without mechanical transmission elements using electrically actuated indicating means
    • G01F23/686—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 floats of the free float type without mechanical transmission elements using electrically actuated indicating means using opto-electrically actuated indicating means

Abstract

The appts. for determining the level of liquid in a container includes a vertical gas filled tube provided in the container. The tube is surrounded by a magnetic float. A magnetic follower in the tube follows the vertical position of the magnet float, and serves as the termination point of an optical measuring path between a light source and a detector. An optical reference path also extends from the light source to a second mirror which may be mounted at a fixed point in the container kor on the opposite side of the follower. The system incorporates means for determining the difference in propagation time of light in the two optical paths.
FR7623741A 1976-08-03 1976-08-03 Measurement of liq. level in container - uses float with magnetic follower in gas filled tube defining end point of measured optical path Pending FR2360873A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7623741A FR2360873A1 (en) 1976-08-03 1976-08-03 Measurement of liq. level in container - uses float with magnetic follower in gas filled tube defining end point of measured optical path

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7623741A FR2360873A1 (en) 1976-08-03 1976-08-03 Measurement of liq. level in container - uses float with magnetic follower in gas filled tube defining end point of measured optical path

Publications (1)

Publication Number Publication Date
FR2360873A1 true FR2360873A1 (en) 1978-03-03

Family

ID=9176517

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7623741A Pending FR2360873A1 (en) 1976-08-03 1976-08-03 Measurement of liq. level in container - uses float with magnetic follower in gas filled tube defining end point of measured optical path

Country Status (1)

Country Link
FR (1) FR2360873A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997042470A1 (en) * 1995-03-28 1997-11-13 Albrigtsen Aage Level-measuring equipment for liquids

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1329765A (en) * 1962-05-30 1963-06-14 Centre Nat Rech Metall Method and device for determining the level of charge in an enclosure
FR1593760A (en) * 1967-11-30 1970-06-01
DE2235329A1 (en) * 1972-07-19 1974-02-07 Gerhard Wendt ARRANGEMENT FOR EXACT LEVEL MEASUREMENT
US3853005A (en) * 1973-08-29 1974-12-10 Measurand Syst Interface measuring apparatus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1329765A (en) * 1962-05-30 1963-06-14 Centre Nat Rech Metall Method and device for determining the level of charge in an enclosure
FR1593760A (en) * 1967-11-30 1970-06-01
DE2235329A1 (en) * 1972-07-19 1974-02-07 Gerhard Wendt ARRANGEMENT FOR EXACT LEVEL MEASUREMENT
US3853005A (en) * 1973-08-29 1974-12-10 Measurand Syst Interface measuring apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997042470A1 (en) * 1995-03-28 1997-11-13 Albrigtsen Aage Level-measuring equipment for liquids

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Legal Events

Date Code Title Description
TP Transmission of property