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FR2242682A1 - Method of detecting water in hydraulic oil - measures permittivity using liquids as capacitor dielectric - Google Patents

Method of detecting water in hydraulic oil - measures permittivity using liquids as capacitor dielectric

Info

Publication number
FR2242682A1
FR2242682A1 FR7417295A FR7417295A FR2242682A1 FR 2242682 A1 FR2242682 A1 FR 2242682A1 FR 7417295 A FR7417295 A FR 7417295A FR 7417295 A FR7417295 A FR 7417295A FR 2242682 A1 FR2242682 A1 FR 2242682A1
Authority
FR
France
Prior art keywords
hydraulic oil
liquids
capacitor dielectric
capacitor
detecting water
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.)
Withdrawn
Application number
FR7417295A
Other languages
French (fr)
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.)
Poclain SA
Original Assignee
Poclain SA
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 Poclain SA filed Critical Poclain SA
Priority to FR7417295A priority Critical patent/FR2242682A1/en
Publication of FR2242682A1 publication Critical patent/FR2242682A1/en
Withdrawn legal-status Critical Current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
    • G01N27/22—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance
    • G01N27/223—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance for determining moisture content, e.g. humidity

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)

Abstract

The presence of one fluid in another fluid is effected by measuring the variation of permittivity of a sample with respect to a reference. A detector circuit comprises a capacitor (1) immersed in a container (2) containing a hydraulic oil sample. An inductor (6) is connected across the capacitor and to one side (4) is connected an alternating current generator (7). To the other side is connected a potentiometer (9) whose slider (10) is connected to an amplifier (12). In the absence of water in the oil the capacitor and inductor form a circuit in resonance with the generator frequency while the presence of water will cause an increase in current through the potentiometer and thus an output from the amplifier to an alarm.
FR7417295A 1974-05-17 1974-05-17 Method of detecting water in hydraulic oil - measures permittivity using liquids as capacitor dielectric Withdrawn FR2242682A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7417295A FR2242682A1 (en) 1974-05-17 1974-05-17 Method of detecting water in hydraulic oil - measures permittivity using liquids as capacitor dielectric

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7417295A FR2242682A1 (en) 1974-05-17 1974-05-17 Method of detecting water in hydraulic oil - measures permittivity using liquids as capacitor dielectric

Publications (1)

Publication Number Publication Date
FR2242682A1 true FR2242682A1 (en) 1975-03-28

Family

ID=9139024

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7417295A Withdrawn FR2242682A1 (en) 1974-05-17 1974-05-17 Method of detecting water in hydraulic oil - measures permittivity using liquids as capacitor dielectric

Country Status (1)

Country Link
FR (1) FR2242682A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0195849A2 (en) * 1985-03-28 1986-10-01 Rockwell International Corporation Device for measuring the water content of ink samples
US4646070A (en) * 1981-11-17 1987-02-24 Nissan Motor Company, Limited Oil deterioration detector method and apparatus
US11982665B2 (en) 2020-11-20 2024-05-14 Dodge Industrial, Inc. Oil quality sensor

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4646070A (en) * 1981-11-17 1987-02-24 Nissan Motor Company, Limited Oil deterioration detector method and apparatus
EP0195849A2 (en) * 1985-03-28 1986-10-01 Rockwell International Corporation Device for measuring the water content of ink samples
EP0195849A3 (en) * 1985-03-28 1987-09-23 Rockwell International Corporation Device for measuring the water content of ink samples
US11982665B2 (en) 2020-11-20 2024-05-14 Dodge Industrial, Inc. Oil quality sensor

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Legal Events

Date Code Title Description
ST Notification of lapse