GB1497120A - Electrode for measuring or controlling liquid depth - Google Patents

Electrode for measuring or controlling liquid depth

Info

Publication number
GB1497120A
GB1497120A GB12613/75A GB1261375A GB1497120A GB 1497120 A GB1497120 A GB 1497120A GB 12613/75 A GB12613/75 A GB 12613/75A GB 1261375 A GB1261375 A GB 1261375A GB 1497120 A GB1497120 A GB 1497120A
Authority
GB
United Kingdom
Prior art keywords
level
probe
pump
collar
collars
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
GB12613/75A
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
Publication of GB1497120A publication Critical patent/GB1497120A/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
    • G01F23/24—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 resistance of resistors due to contact with conductor fluid
    • G01F23/241—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 resistance of resistors due to contact with conductor fluid for discrete levels
    • G01F23/242—Mounting arrangements for electrodes

Landscapes

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

Abstract

1497120 Measuring liquid level electrically B J HIGGINS 26 March 1975 [29 March 1974] 12613/75 Heading G1N An elongated multi-electrode liquid level probe for use in a tank or well comprises a plurality of metal collar sections 2A, 2B separated by insulating sections 1A, 1B which screw into the collars 2A, 2B. A plug 7 threaded to the lower end of section 2B seals the interior of the probe. Leads connected to the terminals 4 attached by lugs 3 to the collars extend upwards through the probe to the exterior and after the probe has been filled with insulating material such as sand the top is sealed by epoxy resin. The probe is mounted vertically in e.g. a sewage tank and as the level rises to bridge the collars signals are produced due to the lowering of the resistance between the collars and the lowest collar 2B. Thus when the level falls to 2B a pump is stopped and the level is allowed to rise to the collar at a second level which when reached causes a signal to be passed to the pump to start it and pump the level back to 2B. If the pump fails and the level rises to the collar at a third level a standby pump is activated and the level cycles between this level and level 2B. If on failure of this pump the level reaches a further collar at a fourth level an alarm is activated. In order to protect the probe from solids in the liquid a pipe may be positioned around the probe which may be provided with a filter across the bottom and/or small holes in the pipe.
GB12613/75A 1974-03-29 1975-03-26 Electrode for measuring or controlling liquid depth Expired GB1497120A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AU709374 1974-03-29

Publications (1)

Publication Number Publication Date
GB1497120A true GB1497120A (en) 1978-01-05

Family

ID=3697698

Family Applications (1)

Application Number Title Priority Date Filing Date
GB12613/75A Expired GB1497120A (en) 1974-03-29 1975-03-26 Electrode for measuring or controlling liquid depth

Country Status (3)

Country Link
AU (1) AU7895375A (en)
GB (1) GB1497120A (en)
SE (1) SE7503353L (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2180939A (en) * 1985-09-25 1987-04-08 Partridge Wilson And Company L Equipment for detecting when the level of a liquid in a container drops below a predetermined level
US4739786A (en) * 1984-11-01 1988-04-26 Craig Parkinson Liquid level monitoring assemblies
US4987082A (en) * 1988-08-05 1991-01-22 Shell Internationale Research Control of foam build up in a fermenter

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU588259B2 (en) * 1984-11-01 1989-09-14 Multitrode Pty Ltd Liquid level monitoring assemblies

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4739786A (en) * 1984-11-01 1988-04-26 Craig Parkinson Liquid level monitoring assemblies
GB2180939A (en) * 1985-09-25 1987-04-08 Partridge Wilson And Company L Equipment for detecting when the level of a liquid in a container drops below a predetermined level
US4987082A (en) * 1988-08-05 1991-01-22 Shell Internationale Research Control of foam build up in a fermenter

Also Published As

Publication number Publication date
SE7503353L (en) 1975-09-30
AU7895375A (en) 1976-09-16

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Legal Events

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