FR2704647B1 - HIGH PRECISION AND SELF-CONTROLLED MEASURING DEVICE OF THE HEIGHT OF A LIQUID IN A SPEAKER. - Google Patents

HIGH PRECISION AND SELF-CONTROLLED MEASURING DEVICE OF THE HEIGHT OF A LIQUID IN A SPEAKER.

Info

Publication number
FR2704647B1
FR2704647B1 FR9305471A FR9305471A FR2704647B1 FR 2704647 B1 FR2704647 B1 FR 2704647B1 FR 9305471 A FR9305471 A FR 9305471A FR 9305471 A FR9305471 A FR 9305471A FR 2704647 B1 FR2704647 B1 FR 2704647B1
Authority
FR
France
Prior art keywords
speaker
self
height
liquid
measuring device
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 - Lifetime
Application number
FR9305471A
Other languages
French (fr)
Other versions
FR2704647A1 (en
Inventor
Claude Luro
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.)
Luro SARL Ets
Original Assignee
Luro SARL Ets
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 Luro SARL Ets filed Critical Luro SARL Ets
Priority to FR9305471A priority Critical patent/FR2704647B1/en
Publication of FR2704647A1 publication Critical patent/FR2704647A1/en
Application granted granted Critical
Publication of FR2704647B1 publication Critical patent/FR2704647B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • G01F23/28—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
    • G01F25/00—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume
    • G01F25/20—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume of apparatus for measuring liquid level

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • A Measuring Device Byusing Mechanical Method (AREA)
FR9305471A 1993-04-30 1993-04-30 HIGH PRECISION AND SELF-CONTROLLED MEASURING DEVICE OF THE HEIGHT OF A LIQUID IN A SPEAKER. Expired - Lifetime FR2704647B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR9305471A FR2704647B1 (en) 1993-04-30 1993-04-30 HIGH PRECISION AND SELF-CONTROLLED MEASURING DEVICE OF THE HEIGHT OF A LIQUID IN A SPEAKER.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9305471A FR2704647B1 (en) 1993-04-30 1993-04-30 HIGH PRECISION AND SELF-CONTROLLED MEASURING DEVICE OF THE HEIGHT OF A LIQUID IN A SPEAKER.

Publications (2)

Publication Number Publication Date
FR2704647A1 FR2704647A1 (en) 1994-11-04
FR2704647B1 true FR2704647B1 (en) 1995-06-30

Family

ID=9446869

Family Applications (1)

Application Number Title Priority Date Filing Date
FR9305471A Expired - Lifetime FR2704647B1 (en) 1993-04-30 1993-04-30 HIGH PRECISION AND SELF-CONTROLLED MEASURING DEVICE OF THE HEIGHT OF A LIQUID IN A SPEAKER.

Country Status (1)

Country Link
FR (1) FR2704647B1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112484806B (en) * 2020-11-30 2022-11-11 安徽江淮汽车集团股份有限公司 Gearbox oil level testing device, testing system and testing method
DE102021100975A1 (en) 2021-01-19 2022-07-21 Vega Grieshaber Kg Field device with adjustable switching points

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH290929A (en) * 1950-03-16 1953-05-31 Soc D Brevets Pour Les Applic Electrical device for measuring the level of a liquid.
GB1139052A (en) * 1966-05-24 1969-01-08 Warner Electric Brake & Clutch Metering systems
FR2523298A1 (en) * 1982-03-15 1983-09-16 Jaeger VOLUMETRIC DEVICE, IN PARTICULAR FOR FUEL IN A RESERVOIR
DE3663999D1 (en) * 1986-04-24 1989-07-20 Normand Equip Ind Optico-electronic level detector with double pick-up elements
US4880982A (en) * 1987-11-17 1989-11-14 Impex Production & Development A/S (Ltd.) Fluid indicator for a containment vessel

Also Published As

Publication number Publication date
FR2704647A1 (en) 1994-11-04

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