FR2374639A1 - FLUID DETECTOR - Google Patents
FLUID DETECTORInfo
- 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
Links
- 239000012530 fluid Substances 0.000 title abstract 6
- 238000001514 detection method Methods 0.000 abstract 1
- 238000003911 water pollution Methods 0.000 abstract 1
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.
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)
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)
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)
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)
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 |
-
1977
- 1977-12-07 NO NO774182A patent/NO148689C/en unknown
- 1977-12-14 AU AU31522/77A patent/AU513588B2/en not_active Expired
- 1977-12-14 GB GB52032/77A patent/GB1596648A/en not_active Expired
- 1977-12-19 CA CA293,360A patent/CA1103052A/en not_active Expired
- 1977-12-19 DK DK566377A patent/DK566377A/en not_active Application Discontinuation
- 1977-12-19 SE SE7714459A patent/SE433007B/en unknown
- 1977-12-19 IT IT69842/77A patent/IT1091381B/en active
- 1977-12-20 DE DE19772756859 patent/DE2756859A1/en active Granted
- 1977-12-20 FR FR7738513A patent/FR2374639A1/en active Granted
- 1977-12-20 JP JP52153494A patent/JPS5928256B2/en not_active Expired
Patent Citations (5)
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)
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 |