FR2374639A1 - FLUID DETECTOR - Google Patents

FLUID DETECTOR

Info

Publication number
FR2374639A1
FR2374639A1 FR7738513A FR7738513A FR2374639A1 FR 2374639 A1 FR2374639 A1 FR 2374639A1 FR 7738513 A FR7738513 A FR 7738513A FR 7738513 A FR7738513 A FR 7738513A FR 2374639 A1 FR2374639 A1 FR 2374639A1
Authority
FR
France
Prior art keywords
fluids
thermistors
fluid detector
different
fluid
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.)
Granted
Application number
FR7738513A
Other languages
French (fr)
Other versions
FR2374639B1 (en
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
Priority claimed from US05/752,199 external-priority patent/US4116045A/en
Application filed by Individual filed Critical Individual
Publication of FR2374639A1 publication Critical patent/FR2374639A1/en
Application granted granted Critical
Publication of FR2374639B1 publication Critical patent/FR2374639B1/fr
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
    • G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
    • G01N27/14—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of an electrically-heated body in dependence upon change of temperature
    • G01N27/18—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of an electrically-heated body in dependence upon change of temperature caused by changes in the thermal conductivity of a surrounding material to be tested
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/18—Water
    • G01N33/1826—Organic contamination in water
    • G01N33/1833—Oil in water
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00—Water conservation; Efficient water supply; Efficient water use
    • Y02A20/20—Controlling water pollution; Waste water treatment

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Pathology (AREA)
  • Immunology (AREA)
  • Physics & Mathematics (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Food Science & Technology (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
  • Investigating Or Analyzing Materials Using Thermal Means (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Measuring Volume Flow (AREA)

Abstract

L'invention concerne la détection d'une couche de fluide flottant sur un autre fluide. Le dispositif de l'invention utilise la différence de conductivité thermique entre les deux fluides. Deux thermistances T1 et T2 sont traversées par le même courant et sont placées en contact avec des fluides différents, lorsqu'on est effectivement en présence de deux fluides. Dans ces conditions, les températures des thermistances, et donc leurs résistances, sont différentes, ce qu'indique le voltmètre V. Application au contrôle de la pollution de l'eau.The invention relates to the detection of a layer of fluid floating on another fluid. The device of the invention uses the difference in thermal conductivity between the two fluids. Two thermistors T1 and T2 are crossed by the same current and are placed in contact with different fluids, when it is actually in the presence of two fluids. Under these conditions, the temperatures of the thermistors, and therefore their resistances, are different, as indicated by the voltmeter V. Application to the control of water pollution.

FR7738513A 1976-12-20 1977-12-20 FLUID DETECTOR Granted FR2374639A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US05/752,199 US4116045A (en) 1976-12-20 1976-12-20 Oil detector
US78534777A 1977-04-07 1977-04-07
US05/825,670 US4159638A (en) 1976-12-20 1977-08-18 Thermistor detector circuit and discriminating network for heat absorptive media

Publications (2)

Publication Number Publication Date
FR2374639A1 true FR2374639A1 (en) 1978-07-13
FR2374639B1 FR2374639B1 (en) 1984-10-26

Family

ID=27419425

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7738513A Granted FR2374639A1 (en) 1976-12-20 1977-12-20 FLUID DETECTOR

Country Status (10)

Country Link
JP (1) JPS5928256B2 (en)
AU (1) AU513588B2 (en)
CA (1) CA1103052A (en)
DE (1) DE2756859A1 (en)
DK (1) DK566377A (en)
FR (1) FR2374639A1 (en)
GB (1) GB1596648A (en)
IT (1) IT1091381B (en)
NO (1) NO148689C (en)
SE (1) SE433007B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2611907A1 (en) * 1987-03-05 1988-09-09 Tolectromed Sarl Medical fluid identifier
EP0484645A1 (en) * 1990-11-09 1992-05-13 Hewlett-Packard Company Methods and systems for fluid identification and flow rate determination
EP0529295A1 (en) * 1991-08-22 1993-03-03 The Perkin-Elmer Corporation Single-element thermal conductivity detector

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4419888A (en) * 1979-06-14 1983-12-13 Kabushikikaisha Shibaura Denshi Seisakusho Humidity measuring method
DE3639435A1 (en) * 1986-11-18 1988-05-26 Hoelter Heinz Volume flow monitoring system for filtering devices
JPH053947Y2 (en) * 1988-02-02 1993-01-29
JPH02290205A (en) * 1989-02-23 1990-11-30 Kurita Water Ind Ltd Coagulating apparatus
IT1312311B1 (en) * 1999-05-07 2002-04-15 Thermoquest Italia Spa DEVICE FOR THE MEASUREMENT OF THE THERMAL CONDUCTIVITY OF A FLUID
US7003418B2 (en) * 2003-08-28 2006-02-21 Honeywell International Inc. Methods and systems for temperature compensation of physical property sensors
DE102018130890A1 (en) * 2018-12-04 2020-06-04 Bcs Automotive Interface Solutions Gmbh Liquid sensor, manufacturing method for a liquid sensor and measuring method for determining a liquid contact

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2650496A (en) * 1948-05-17 1953-09-01 Phillips Petroleum Co Fluid flowmeter with heated resistance bridge circuit
US3429178A (en) * 1965-01-07 1969-02-25 Enoch J Durbin Measuring system
US3719936A (en) * 1971-06-01 1973-03-06 Durham Ass Inc Oil spillage detection system
US3780565A (en) * 1972-10-19 1973-12-25 Gen Motors Corp Fluid vaporization tester
GB1372695A (en) * 1971-12-07 1974-11-06 Pye Ltd Thermal conductivity detector apparatus

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1249566B (en) * 1967-09-07
US3864959A (en) * 1971-12-16 1975-02-11 Pye Ltd Thermal conductivity detector apparatus
AT326753B (en) * 1972-11-16 1975-12-29 Danfoss As MEASUREMENT TRANSDUCER WITH A COMPENSATION BRIDGE CIRCLE
US3913379A (en) * 1973-10-18 1975-10-21 Tibor Rusz Dynamic gas analyzer
AT350299B (en) * 1975-06-26 1979-05-25 Uher Ag CIRCUIT WITH LINEAR TEMPERATURE-DEPENDENT TOTAL RESISTANCE

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2650496A (en) * 1948-05-17 1953-09-01 Phillips Petroleum Co Fluid flowmeter with heated resistance bridge circuit
US3429178A (en) * 1965-01-07 1969-02-25 Enoch J Durbin Measuring system
US3719936A (en) * 1971-06-01 1973-03-06 Durham Ass Inc Oil spillage detection system
GB1372695A (en) * 1971-12-07 1974-11-06 Pye Ltd Thermal conductivity detector apparatus
US3780565A (en) * 1972-10-19 1973-12-25 Gen Motors Corp Fluid vaporization tester

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2611907A1 (en) * 1987-03-05 1988-09-09 Tolectromed Sarl Medical fluid identifier
EP0484645A1 (en) * 1990-11-09 1992-05-13 Hewlett-Packard Company Methods and systems for fluid identification and flow rate determination
US5515295A (en) * 1990-11-09 1996-05-07 Hewlett-Packard Company Methods and systems for fluid identification and flow rate determination
EP0529295A1 (en) * 1991-08-22 1993-03-03 The Perkin-Elmer Corporation Single-element thermal conductivity detector
US5265459A (en) * 1991-08-22 1993-11-30 The Perkin Elmer Corporation Single-element thermal conductivity detector

Also Published As

Publication number Publication date
FR2374639B1 (en) 1984-10-26
NO148689C (en) 1983-11-30
AU3152277A (en) 1979-06-21
SE7714459L (en) 1978-06-21
AU513588B2 (en) 1980-12-11
JPS5383795A (en) 1978-07-24
NO774182L (en) 1978-06-21
DK566377A (en) 1978-06-21
JPS5928256B2 (en) 1984-07-11
SE433007B (en) 1984-04-30
DE2756859C2 (en) 1991-04-25
CA1103052A (en) 1981-06-16
NO148689B (en) 1983-08-15
GB1596648A (en) 1981-08-26
IT1091381B (en) 1985-07-06
DE2756859A1 (en) 1978-07-06

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Legal Events

Date Code Title Description
ST Notification of lapse