GB1049378A - Photo-electric turbidimeter - Google Patents

Photo-electric turbidimeter

Info

Publication number
GB1049378A
GB1049378A GB3999862A GB3999862A GB1049378A GB 1049378 A GB1049378 A GB 1049378A GB 3999862 A GB3999862 A GB 3999862A GB 3999862 A GB3999862 A GB 3999862A GB 1049378 A GB1049378 A GB 1049378A
Authority
GB
United Kingdom
Prior art keywords
turbidometer
fed
photo
sample
oct
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
GB3999862A
Inventor
Kenneth Arthur Sherwin
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.)
Fisons Fertilizers Ltd
Fisons Ltd
Original Assignee
Fisons Fertilizers Ltd
Fisons Ltd
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 Fisons Fertilizers Ltd, Fisons Ltd filed Critical Fisons Fertilizers Ltd
Publication of GB1049378A publication Critical patent/GB1049378A/en
Expired 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
    • G01N21/255—Details, e.g. use of specially adapted sources, lighting or optical systems
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/10—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void
    • G01J1/20—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void intensity of the measured or reference value being varied to equalise their effects at the detectors, e.g. by varying incidence angle
    • G01J1/28—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void intensity of the measured or reference value being varied to equalise their effects at the detectors, e.g. by varying incidence angle using variation of intensity or distance of source
    • G01J1/30—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void intensity of the measured or reference value being varied to equalise their effects at the detectors, e.g. by varying incidence angle using variation of intensity or distance of source using electric radiation detectors
    • 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
    • G01N21/27—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands using photo-electric detection ; circuits for computing concentration
    • G01N21/274—Calibration, base line adjustment, drift correction
    • 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
    • G01N21/47—Scattering, i.e. diffuse reflection
    • G01N21/49—Scattering, i.e. diffuse reflection within a body or fluid
    • G01N21/53—Scattering, i.e. diffuse reflection within a body or fluid within a flowing fluid, e.g. smoke
    • G01N21/534—Scattering, i.e. diffuse reflection within a body or fluid within a flowing fluid, e.g. smoke by measuring transmission alone, i.e. determining opacity
    • 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
    • G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
    • G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
    • G01N21/82—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator producing a precipitate or turbidity

Abstract

1,049,378. Automatic control. FISONS FERTILIZERS Ltd. Oct. 15, 1963 [Oct. 23, 1962], No. 39998/62. Heading G3R. [Also in Division G1] In an arrangement for the automatic control of the sulphate ion concentration in the reaction of sulphuric acid with phosphate rock to produce phosphoric acid, a filtered sample from the reaction vessel is fed over line 36 to a two stage diluting system. From this a measured quantity of diluted sample can be fed to mixing chamber 86 together with a measured amount of barium chloride solution on operation of the inlet valves. The mixture is stirred and then fed to the measuring cell 3 of a photo-electric turbidometer. This turbidometer may include a process timer providing a period during which the zero level of light falling on the photo-sensitive element through cell 3 when either empty or filled with water is set prior to measurement on a sample. The electrical output of the turbidometer is fed to controller 111 operating valve 113 pneumatically to control the acid flow to the reaction vessel. Programme device 45 controls the operation of the valves and turbidometer to direct successive samples to the test cell and automatically maintain the required sulphate ion concentration.
GB3999862A 1965-01-29 1962-10-23 Photo-electric turbidimeter Expired GB1049378A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6501157A NL6501157A (en) 1965-01-29 1965-01-29

Publications (1)

Publication Number Publication Date
GB1049378A true GB1049378A (en) 1966-11-23

Family

ID=19792221

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3999862A Expired GB1049378A (en) 1965-01-29 1962-10-23 Photo-electric turbidimeter

Country Status (2)

Country Link
GB (1) GB1049378A (en)
NL (1) NL6501157A (en)

Also Published As

Publication number Publication date
NL6501157A (en) 1966-08-01

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