FR2045580A1 - Visual estimation of suspended particles - in liquid - Google Patents

Visual estimation of suspended particles - in liquid

Info

Publication number
FR2045580A1
FR2045580A1 FR6918084A FR6918084A FR2045580A1 FR 2045580 A1 FR2045580 A1 FR 2045580A1 FR 6918084 A FR6918084 A FR 6918084A FR 6918084 A FR6918084 A FR 6918084A FR 2045580 A1 FR2045580 A1 FR 2045580A1
Authority
FR
France
Prior art keywords
liquid
light
suspended particles
visual estimation
grating
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Withdrawn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
FR6918084A
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.)
SEREB STE
Original Assignee
SEREB STE
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 SEREB STE filed Critical SEREB STE
Priority to FR6918084A priority Critical patent/FR2045580A1/en
Publication of FR2045580A1 publication Critical patent/FR2045580A1/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Withdrawn legal-status Critical Current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
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • G01N21/29—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands using visual detection
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • G01N21/29—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands using visual detection
    • G01N21/293—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands using visual detection with colour charts, graduated scales or turrets

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

The degree of pollution in a lubricating oil, or concentration of suspended particles in other liquids, is estimated by visual comparison of the amount of light obscured by the liquid and by an optical filter which is given a value grading. The instrument comprises a viewing box in which a test tube of the liquid is placed next to a crystalline grating and both are viewed from one side whilst a beam of light shines on the other side. A selection of optical filters is then interposed between the light source and the grating until the light through the liquid is matched. The instrument is simple and portable, and the method is rapid.
FR6918084A 1969-06-02 1969-06-02 Visual estimation of suspended particles - in liquid Withdrawn FR2045580A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR6918084A FR2045580A1 (en) 1969-06-02 1969-06-02 Visual estimation of suspended particles - in liquid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR6918084A FR2045580A1 (en) 1969-06-02 1969-06-02 Visual estimation of suspended particles - in liquid

Publications (1)

Publication Number Publication Date
FR2045580A1 true FR2045580A1 (en) 1971-03-05

Family

ID=9035004

Family Applications (1)

Application Number Title Priority Date Filing Date
FR6918084A Withdrawn FR2045580A1 (en) 1969-06-02 1969-06-02 Visual estimation of suspended particles - in liquid

Country Status (1)

Country Link
FR (1) FR2045580A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0043330A1 (en) * 1980-07-01 1982-01-06 Aerospatiale Societe Nationale Industrielle System for standardizing the monitoring of a liquid contained in a transparent container

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0043330A1 (en) * 1980-07-01 1982-01-06 Aerospatiale Societe Nationale Industrielle System for standardizing the monitoring of a liquid contained in a transparent container
FR2486241A1 (en) * 1980-07-01 1982-01-08 Soudure Autogene Francaise REFERENCE SYSTEM FOR CONTROLLING A LIQUID CONTAINED IN A TRANSPARENT CONTAINER IN THE DETECTION MODE

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Legal Events

Date Code Title Description
ST Notification of lapse