GB1077043A - Fluid depth indicator - Google Patents

Fluid depth indicator

Info

Publication number
GB1077043A
GB1077043A GB2619964A GB2619964A GB1077043A GB 1077043 A GB1077043 A GB 1077043A GB 2619964 A GB2619964 A GB 2619964A GB 2619964 A GB2619964 A GB 2619964A GB 1077043 A GB1077043 A GB 1077043A
Authority
GB
United Kingdom
Prior art keywords
liquid
junctions
output
level
quantizers
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
GB2619964A
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.)
TRANS SONICS Inc
Original Assignee
TRANS SONICS Inc
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 TRANS SONICS Inc filed Critical TRANS SONICS Inc
Publication of GB1077043A publication Critical patent/GB1077043A/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
    • G01F23/246—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 thermal devices
    • 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

Landscapes

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

Abstract

1,077,043. Locating the surface of a liquid. TRANS-SONICS Inc. June 24, 1964 [June 26, 1963], No. 26199/64. Heading G4H. Apparatus for locating the surface of a liquid comprises thermo-electric junctions or thermistors arranged at different depths in the liquid so that the net thermo-electric voltage developed alternates between first and second voltages as the level of the liquid rises or descends. In one embodiment (Fig. 1, not shown) the thermoelectric potentials of successive junctions are of opposite polarity so that when none of the junctions are covered by liquid a zero output is obtained, when one of the junctions is covered, the output voltage rises and when two junctions are covered and the output voltage again drops to zero. The junctions are preferably heated since the liquid removes heat from an immersed junction more rapidly than the atmosphere above the liquid removes heat from a non- immersed junction. In the embodiment of Fig. 4 a plurality of stacks of thermo-electric junctions 50, 52, 54, 56 formed from two metals A, B are arranged so that the outputs from the stacks give a Gray code representation of the level of the liquid. The outputs are connected to quantizers 76 which may be for example Schmitt triggers to give a " 1 " output when the input voltage is above a certain level and a " O " output when the voltage falls below this level. The quantizers are also fed with biasing voltages to allow for the variation in heating current fed to the stacks from a transformer 22. The outputs from the quantizers are fed to a Gray's binary to pure binary converter and also to an analogue converter the output of which is indicated by a meter 80.
GB2619964A 1963-06-26 1964-06-24 Fluid depth indicator Expired GB1077043A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US29075763A 1963-06-26 1963-06-26

Publications (1)

Publication Number Publication Date
GB1077043A true GB1077043A (en) 1967-07-26

Family

ID=23117427

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2619964A Expired GB1077043A (en) 1963-06-26 1964-06-24 Fluid depth indicator

Country Status (2)

Country Link
DE (1) DE1284111B (en)
GB (1) GB1077043A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4521373A (en) * 1982-08-23 1985-06-04 General Electric Company Liquid level sensor

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD20088A (en) *
DE595691C (en) * 1931-01-10 1934-04-16 Friedrich Nettel Dipl Ing Device for displaying the liquid level in containers
DE1800466A1 (en) * 1967-10-06 1969-05-08 Ohg Edmondo Balsamo S R L Stopcock with built-in filter

Also Published As

Publication number Publication date
DE1284111B (en) 1968-11-28

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