GB1213128A - Improvements in or relating to fluid level detecting devices - Google Patents

Improvements in or relating to fluid level detecting devices

Info

Publication number
GB1213128A
GB1213128A GB351467A GB351467A GB1213128A GB 1213128 A GB1213128 A GB 1213128A GB 351467 A GB351467 A GB 351467A GB 351467 A GB351467 A GB 351467A GB 1213128 A GB1213128 A GB 1213128A
Authority
GB
United Kingdom
Prior art keywords
electrodes
capacitors
fluid
amplifier
feedback
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
GB351467A
Inventor
Edward Leonard Naylor
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 GB351467A priority Critical patent/GB1213128A/en
Publication of GB1213128A publication Critical patent/GB1213128A/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
    • G01F23/266—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 measuring circuits therefor
    • 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
    • G01F23/265—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 for discrete levels
    • 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
    • G01F23/268—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 mounting arrangements of probes

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

1,213,128. Monitoring fluid level electrically. C.I.A. ELLIS. Jan. 10, 1968 [Jan. 24, 1967], No.3514/67. Heading G1H. The capacitance values of first and second pairs of electrodes 10, 12 and 10, 14, Fig.3, are equal when a fluid level 18 (or the interface level between a pair of fluids) is located either below or above the position of the electrodes, but become unequal when the level registers with either one of the pairs or the space between. The capacitors C1, C2, Fig. 2, formed by the electrodes are connected in a bridge circuit to determine the feedback between the input and output of an amplifier A by way of a transformer L, Lc, the arrangement being such feedback occures to produce oscillation in the amplifier loop only when the bridge circuit is unbalanced. Thus, the production of oscillation indicates that the liquid or interface level occurs within the predetermined region of container 16, Fig. 3, occupied by the electrodes. A detecting and amplifying circuit may respond to the oscillations to actuate a visual or aural alarm. The electrodes may be mounted inside tube 16, and at least one may be coated with an insulating material which has no chemical reaction with the fluid in the tube. Where the tube is made of conductive material it may form electrode 10. Balancing capacitors may be connected across each of capacitors C1 and C2. In an alternative circuit arrangement, Fig. 1 (not shown), the two capacitors form the feedback connection from a phase-splitter at the output of the amplifier to the input. The term "fluid" is intended to embrace dry powders, sherries and suspensions as well as liquids.
GB351467A 1967-01-24 1967-01-24 Improvements in or relating to fluid level detecting devices Expired GB1213128A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB351467A GB1213128A (en) 1967-01-24 1967-01-24 Improvements in or relating to fluid level detecting devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB351467A GB1213128A (en) 1967-01-24 1967-01-24 Improvements in or relating to fluid level detecting devices

Publications (1)

Publication Number Publication Date
GB1213128A true GB1213128A (en) 1970-11-18

Family

ID=9759770

Family Applications (1)

Application Number Title Priority Date Filing Date
GB351467A Expired GB1213128A (en) 1967-01-24 1967-01-24 Improvements in or relating to fluid level detecting devices

Country Status (1)

Country Link
GB (1) GB1213128A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3517781A1 (en) * 1985-05-17 1986-10-16 Heinrich Wüst KG, 7536 Ispringen RC Oscillator with X-measuring capacitors
GB2329021A (en) * 1997-09-05 1999-03-10 Assembled Supplies Fluid level monitor
FR2833699A1 (en) * 2001-12-19 2003-06-20 Bio Merieux System to control the charging of receptacles with a sample liquid, in e.g. a container or analysis card, in which the presence or absence is registered together with the amount of air in each receptacle
GB2399643A (en) * 2003-02-13 2004-09-22 Jackson Mcs Inc Non-contact liquid sensing apparatus, system, and method
DE102004019351A1 (en) * 2003-12-22 2005-07-14 BSH Bosch und Siemens Hausgeräte GmbH Dishwasher with a system for level detection
US7748394B2 (en) 2003-12-22 2010-07-06 Bsh Bosch Und Siemens Hausgeraete Gmbh Dishwasher with a system for recognition of filling level
CN118090841A (en) * 2024-04-26 2024-05-28 常熟理工学院 Fluid layering interface detection device, paraffin and PTFE separation device and method

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3517781A1 (en) * 1985-05-17 1986-10-16 Heinrich Wüst KG, 7536 Ispringen RC Oscillator with X-measuring capacitors
GB2329021A (en) * 1997-09-05 1999-03-10 Assembled Supplies Fluid level monitor
FR2833699A1 (en) * 2001-12-19 2003-06-20 Bio Merieux System to control the charging of receptacles with a sample liquid, in e.g. a container or analysis card, in which the presence or absence is registered together with the amount of air in each receptacle
WO2003052359A1 (en) * 2001-12-19 2003-06-26 Biomerieux Device for the capacitive measuring of a fill level
GB2399643A (en) * 2003-02-13 2004-09-22 Jackson Mcs Inc Non-contact liquid sensing apparatus, system, and method
DE102004019351A1 (en) * 2003-12-22 2005-07-14 BSH Bosch und Siemens Hausgeräte GmbH Dishwasher with a system for level detection
US7748394B2 (en) 2003-12-22 2010-07-06 Bsh Bosch Und Siemens Hausgeraete Gmbh Dishwasher with a system for recognition of filling level
CN118090841A (en) * 2024-04-26 2024-05-28 常熟理工学院 Fluid layering interface detection device, paraffin and PTFE separation device and method

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Legal Events

Date Code Title Description
PS Patent sealed
PLE Entries relating assignments, transmissions, licences in the register of patents
PCNP Patent ceased through non-payment of renewal fee