FR2447541A1 - Tank capacitive liq. level monitor - using electrode plates coupled to HF oscillator and via amplifier to level indicator - Google Patents

Tank capacitive liq. level monitor - using electrode plates coupled to HF oscillator and via amplifier to level indicator

Info

Publication number
FR2447541A1
FR2447541A1 FR7901654A FR7901654A FR2447541A1 FR 2447541 A1 FR2447541 A1 FR 2447541A1 FR 7901654 A FR7901654 A FR 7901654A FR 7901654 A FR7901654 A FR 7901654A FR 2447541 A1 FR2447541 A1 FR 2447541A1
Authority
FR
France
Prior art keywords
tank
electrode plates
liq
level
oscillator
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.)
Granted
Application number
FR7901654A
Other languages
French (fr)
Other versions
FR2447541B1 (en
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to FR7901654A priority Critical patent/FR2447541B1/en
Publication of FR2447541A1 publication Critical patent/FR2447541A1/en
Application granted granted Critical
Publication of FR2447541B1 publication Critical patent/FR2447541B1/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

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Electromagnetism (AREA)
  • Thermal Sciences (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)

Abstract

The monitor uses a pair of parallel electrode plates (12, 13) attached to one of the vertical sides of the tank (11), the capacitance between them corresp. to the level of liq. within the tank (11). An HF oscillator supplies an AC voltage to one of the electrode plates (12) such that the capacitive current component between them is large w.r.t. the ohmic current component. The other electrode plate (13) is coupled to an amplifier (16) the output of which is connected to a display (20) indicating the level in the tank, via an AC/DC converter (19). The electrode plates (12, 13) are shaped so that the surface of each covered by the rising liq. in the tank (11) is directly proportional to the fluid vol. contained in the tank (11).
FR7901654A 1979-01-23 1979-01-23 DEVICE FOR DETERMINING THE LEVEL OF A LIQUID IN A TANK Expired FR2447541B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7901654A FR2447541B1 (en) 1979-01-23 1979-01-23 DEVICE FOR DETERMINING THE LEVEL OF A LIQUID IN A TANK

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7901654A FR2447541B1 (en) 1979-01-23 1979-01-23 DEVICE FOR DETERMINING THE LEVEL OF A LIQUID IN A TANK

Publications (2)

Publication Number Publication Date
FR2447541A1 true FR2447541A1 (en) 1980-08-22
FR2447541B1 FR2447541B1 (en) 1986-07-11

Family

ID=9221090

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7901654A Expired FR2447541B1 (en) 1979-01-23 1979-01-23 DEVICE FOR DETERMINING THE LEVEL OF A LIQUID IN A TANK

Country Status (1)

Country Link
FR (1) FR2447541B1 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2031373A1 (en) * 1970-06-25 1972-01-05 Beuttenmueller A Method and arrangement for detecting an electrically conductive substance
FR2341843A1 (en) * 1976-02-19 1977-09-16 Vdo Schindling DEVICE ALLOWING TO MONITOR THE LEVEL OF A LIQUID IN TANKS

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2031373A1 (en) * 1970-06-25 1972-01-05 Beuttenmueller A Method and arrangement for detecting an electrically conductive substance
FR2341843A1 (en) * 1976-02-19 1977-09-16 Vdo Schindling DEVICE ALLOWING TO MONITOR THE LEVEL OF A LIQUID IN TANKS

Also Published As

Publication number Publication date
FR2447541B1 (en) 1986-07-11

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Legal Events

Date Code Title Description
ST Notification of lapse