GB1480768A - Conductive liquid level indicator - Google Patents

Conductive liquid level indicator

Info

Publication number
GB1480768A
GB1480768A GB3674674A GB3674674A GB1480768A GB 1480768 A GB1480768 A GB 1480768A GB 3674674 A GB3674674 A GB 3674674A GB 3674674 A GB3674674 A GB 3674674A GB 1480768 A GB1480768 A GB 1480768A
Authority
GB
United Kingdom
Prior art keywords
coils
liquid level
coil
level indicator
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
GB3674674A
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.)
MSA Safety Inc
Original Assignee
Mine Safety Appliances Co
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 Mine Safety Appliances Co filed Critical Mine Safety Appliances Co
Publication of GB1480768A publication Critical patent/GB1480768A/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)
  • Level Indicators Using A Float (AREA)
  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)

Abstract

1480768 Measuring liquid level electrically MINE SAFETY APPLIANCES CO 21 Aug 1974 [30 Aug 1973] 36746/74 Heading G1N(C) A conductive liquid level indicator comprises a series of identical coils 16-1 to 16-n and means 26, 28 for comparing the impedance of each coil to that of the next adjacent coil successively from one and of the series of coils to the other. The coils are mounted on a steel rod 18 and contained within a non-magnetic stainless steel tube 22 inserted from the top of the tank 10 containing liquid metal 12 to a level 14. The impedance comparing means may comprise a bridge circuit, Fig. 2 (not shown), and selector switches (40, 42) or two pole switches may be used to connect the coils in successive pairs, one coil in one arm of the bridge and the other in another arm.
GB3674674A 1973-08-30 1974-08-21 Conductive liquid level indicator Expired GB1480768A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US39296573A 1973-08-30 1973-08-30

Publications (1)

Publication Number Publication Date
GB1480768A true GB1480768A (en) 1977-07-27

Family

ID=23552735

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3674674A Expired GB1480768A (en) 1973-08-30 1974-08-21 Conductive liquid level indicator

Country Status (3)

Country Link
JP (1) JPS5427269B2 (en)
FR (1) FR2242669B1 (en)
GB (1) GB1480768A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106679764A (en) * 2017-02-10 2017-05-17 衡阳镭目科技有限责任公司 Conductive liquid level detecting device

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE421088B (en) * 1979-01-31 1981-11-23 Inst Elektroswarki Patona INDUCTION SENSOR FOR SENSITIZING THE LEVEL OF A MELT METAL
FR2580801B1 (en) * 1985-04-23 1987-07-10 Novatome DEVICE FOR MEASURING THE LEVEL OF AN ELECTRICALLY CONDUCTIVE MEDIUM CONTAINED IN AN ENCLOSURE AND ITS APPLICATIONS

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106679764A (en) * 2017-02-10 2017-05-17 衡阳镭目科技有限责任公司 Conductive liquid level detecting device

Also Published As

Publication number Publication date
FR2242669A1 (en) 1975-03-28
JPS5427269B2 (en) 1979-09-08
DE2436681A1 (en) 1975-03-06
DE2436681B2 (en) 1976-04-15
JPS5051760A (en) 1975-05-08
FR2242669B1 (en) 1978-10-06

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee