GB1318512A - Apparatus for detecting changes in the level of a pourable material - Google Patents

Apparatus for detecting changes in the level of a pourable material

Info

Publication number
GB1318512A
GB1318512A GB1318512DA GB1318512A GB 1318512 A GB1318512 A GB 1318512A GB 1318512D A GB1318512D A GB 1318512DA GB 1318512 A GB1318512 A GB 1318512A
Authority
GB
United Kingdom
Prior art keywords
uninsulated
insulated
level
frequency
capacitance
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
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.)
Greater London Council
Original Assignee
Greater London Council
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 Greater London Council filed Critical Greater London Council
Publication of GB1318512A publication Critical patent/GB1318512A/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

1318512 Electric Level detectives GREATER LONDON COUNCIL 11 June 1970 [12 March 1969] 12996/69 Heading G1N Changes in level of an electrically conductive liquid or particulate solid material are detected by immercing a capacitive probe having one insulated and one uninsulated electrode in the liquid or material, the change in capacitance being utilized to provide a signal which is transmitted to a monitoring station. As shown, the probe includes an insulated central wire 31 and an uninsulated outer conductor 41. In alternatives, the central wire is uninsulated and the outer conductor is insulated, Fig.2 (not shown) and the uninsulated wire is provided to one side of a bank of insulated plates. In further alternatives, the capacitor is in the form of round wires or rectangular strips with spacers in brass or plastics tubes. Changes in capacitance either control, the frequency of an oscillator, the frequency signal then being transmitted via radio or ground link to a remote station, Fig. 1 (not shown), or the width of constant frequency pulses which are integrated to provide a D.C. voltage for meter indication, and to control a frequency generator to transmit the information to a remote station, Fig.4 (not shown).
GB1318512D 1969-03-12 1969-03-12 Apparatus for detecting changes in the level of a pourable material Expired GB1318512A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1299669 1969-03-12

Publications (1)

Publication Number Publication Date
GB1318512A true GB1318512A (en) 1973-05-31

Family

ID=10014926

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1318512D Expired GB1318512A (en) 1969-03-12 1969-03-12 Apparatus for detecting changes in the level of a pourable material

Country Status (1)

Country Link
GB (1) GB1318512A (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0037792A1 (en) * 1980-03-25 1981-10-14 Arbed S.A. Device for measuring the level of slag in a furnace for molten metal during pig iron refining
FR2514498A1 (en) * 1981-10-12 1983-04-15 Jagenberg Werke Ag DEVICE FOR DELIVERING VERY SMALL QUANTITIES OF A LIQUID
US4399699A (en) * 1979-07-23 1983-08-23 Nissan Motor Co., Ltd. Electrostatic type fuel measuring device
GB2142145A (en) * 1983-04-27 1985-01-09 Electronic Components Ltd Liquid level sensing apparatus
US4531407A (en) * 1980-10-16 1985-07-30 Nissan Motor Company, Limited Fuel gauge for an automotive vehicle
WO1985004008A1 (en) * 1984-03-05 1985-09-12 Skand - Instrument A/S Sensing element for a capacitive level measuring system
EP0478069A1 (en) * 1990-09-26 1992-04-01 Magnavox Government and Industrial Electronics Company Variable capacitive sensor element
WO2010092055A1 (en) * 2009-02-11 2010-08-19 Inergy Automotive Systems Research (Société Anonyme) Motionless liquid level gauge having three electrodes
CN106289449A (en) * 2015-06-11 2017-01-04 陈俊平 Condenser type water level and flow detection device and kettle, detection method
DE102019217432A1 (en) * 2019-11-12 2021-05-12 Vega Grieshaber Kg Sensor head for a sensor unit

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4399699A (en) * 1979-07-23 1983-08-23 Nissan Motor Co., Ltd. Electrostatic type fuel measuring device
EP0037792A1 (en) * 1980-03-25 1981-10-14 Arbed S.A. Device for measuring the level of slag in a furnace for molten metal during pig iron refining
US4531407A (en) * 1980-10-16 1985-07-30 Nissan Motor Company, Limited Fuel gauge for an automotive vehicle
FR2514498A1 (en) * 1981-10-12 1983-04-15 Jagenberg Werke Ag DEVICE FOR DELIVERING VERY SMALL QUANTITIES OF A LIQUID
GB2142145A (en) * 1983-04-27 1985-01-09 Electronic Components Ltd Liquid level sensing apparatus
WO1985004008A1 (en) * 1984-03-05 1985-09-12 Skand - Instrument A/S Sensing element for a capacitive level measuring system
EP0478069A1 (en) * 1990-09-26 1992-04-01 Magnavox Government and Industrial Electronics Company Variable capacitive sensor element
WO2010092055A1 (en) * 2009-02-11 2010-08-19 Inergy Automotive Systems Research (Société Anonyme) Motionless liquid level gauge having three electrodes
CN106289449A (en) * 2015-06-11 2017-01-04 陈俊平 Condenser type water level and flow detection device and kettle, detection method
DE102019217432A1 (en) * 2019-11-12 2021-05-12 Vega Grieshaber Kg Sensor head for a sensor unit

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees