GB1129842A - A method of and a circuit arrangement for indicating when an electrically conductive liquid reaches a predetermined level - Google Patents

A method of and a circuit arrangement for indicating when an electrically conductive liquid reaches a predetermined level

Info

Publication number
GB1129842A
GB1129842A GB2912266A GB2912266A GB1129842A GB 1129842 A GB1129842 A GB 1129842A GB 2912266 A GB2912266 A GB 2912266A GB 2912266 A GB2912266 A GB 2912266A GB 1129842 A GB1129842 A GB 1129842A
Authority
GB
United Kingdom
Prior art keywords
indicating
liquid reaches
electrically conductive
predetermined level
conductive liquid
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
GB2912266A
Inventor
Frank Huntingford
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.)
Philips Components Ltd
Original Assignee
Mullard Ltd
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 Mullard Ltd filed Critical Mullard Ltd
Priority to GB2912266A priority Critical patent/GB1129842A/en
Publication of GB1129842A publication Critical patent/GB1129842A/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
    • G01F23/261—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 for discrete levels

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Electromagnetism (AREA)
  • Power Engineering (AREA)
  • Thermal Sciences (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)

Abstract

1,129,842. Liquid level induction. MULLARD Ltd. Sept.28, 1967 [June 29, 1966], No.29122/66. Heading G1H In a method of indicating when an electrically conductive liquid reaches a predetermined level, an oscillatory circuit 1, connected through a detector circuit 2 to a switching arrangement 3, is shortcircuited when the liquid reaches the pre-determined level thus reducing the impedance of a coil 11 and monitoring the oscillations to detect when such oscillations stop and when the level is reached by the liquid. The oscillations may be monitored by a diode detector circuit which may be connected to a switching arrangement comprising a switching transistor and relay coil or replaced by thyristor or triac triggering device.
GB2912266A 1966-06-29 1966-06-29 A method of and a circuit arrangement for indicating when an electrically conductive liquid reaches a predetermined level Expired GB1129842A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2912266A GB1129842A (en) 1966-06-29 1966-06-29 A method of and a circuit arrangement for indicating when an electrically conductive liquid reaches a predetermined level

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2912266A GB1129842A (en) 1966-06-29 1966-06-29 A method of and a circuit arrangement for indicating when an electrically conductive liquid reaches a predetermined level

Publications (1)

Publication Number Publication Date
GB1129842A true GB1129842A (en) 1968-10-09

Family

ID=10286512

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2912266A Expired GB1129842A (en) 1966-06-29 1966-06-29 A method of and a circuit arrangement for indicating when an electrically conductive liquid reaches a predetermined level

Country Status (1)

Country Link
GB (1) GB1129842A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2283482A1 (en) * 1974-07-25 1976-03-26 Mallory & Co Inc P R LIQUID LEVEL CONTROL DEVICE

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2283482A1 (en) * 1974-07-25 1976-03-26 Mallory & Co Inc P R LIQUID LEVEL CONTROL DEVICE

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