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 pathInfo
- 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
Links
- 230000003287 optical effect Effects 0.000 title abstract 4
- 238000005259 measurement Methods 0.000 title 1
- 239000007788 liquid Substances 0.000 abstract 1
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
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Thermal Sciences (AREA)
- Level Indicators Using A Float (AREA)
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.
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)
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)
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 |
-
1976
- 1976-08-03 FR FR7623741A patent/FR2360873A1/en active Pending
Patent Citations (4)
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)
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 |