GB1245690A - Digitalized coincidence correction method and circuitry for particle analysis apparatus - Google Patents

Digitalized coincidence correction method and circuitry for particle analysis apparatus

Info

Publication number
GB1245690A
GB1245690A GB28341/69A GB2834169A GB1245690A GB 1245690 A GB1245690 A GB 1245690A GB 28341/69 A GB28341/69 A GB 28341/69A GB 2834169 A GB2834169 A GB 2834169A GB 1245690 A GB1245690 A GB 1245690A
Authority
GB
United Kingdom
Prior art keywords
count
particle analysis
digitalized
circuitry
correction method
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
GB28341/69A
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.)
Coulter Electronics Ltd
Coulter Electronics Inc
Original Assignee
Coulter Electronics Ltd
Coulter Electronics Inc
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 Coulter Electronics Ltd, Coulter Electronics Inc filed Critical Coulter Electronics Ltd
Publication of GB1245690A publication Critical patent/GB1245690A/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
    • G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
    • G01N15/10—Investigating individual particles
    • G01N15/1031—Investigating individual particles by measuring electrical or magnetic effects
    • G01N15/12—Investigating individual particles by measuring electrical or magnetic effects by observing changes in resistance or impedance across apertures when traversed by individual particles, e.g. by using the Coulter principle
    • G01N15/131—Details
    • G01N15/132—Circuits

Landscapes

  • Chemical & Material Sciences (AREA)
  • Biochemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Dispersion Chemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
  • Investigating Or Analysing Biological Materials (AREA)
  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
  • Indication And Recording Devices For Special Purposes And Tariff Metering Devices (AREA)

Abstract

1,245,690. Particle analysis. COULTER ELECTRONICS . Ltd. 16 June, 1969 [19 June, 1968 (2)], No. 28341/69. Headings G4A and G4D. Statistical correction of count in particle analysis is made of augmenting the count artificially at the attainment of certain values. In apparatus of the Coulter type in which particles passing through an aperture 5 vary the resistance between electrodes 6, 7, two particles will sometimes be registered as one. For a measured volume of fluid the necessary correction is proportional to the square of the count. Each thousandth count pulse energizes a correction circuit 35 so as to augment the count by an amount which increases according to the range which the counter 16-21 has attained. At the end of a test the counter is interrogated by stage 23 and the result is printed at 32.
GB28341/69A 1968-06-19 1969-06-16 Digitalized coincidence correction method and circuitry for particle analysis apparatus Expired GB1245690A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR155650 1968-06-19
FR155649 1968-06-19

Publications (1)

Publication Number Publication Date
GB1245690A true GB1245690A (en) 1971-09-08

Family

ID=26182068

Family Applications (1)

Application Number Title Priority Date Filing Date
GB28341/69A Expired GB1245690A (en) 1968-06-19 1969-06-16 Digitalized coincidence correction method and circuitry for particle analysis apparatus

Country Status (7)

Country Link
US (1) US3626164A (en)
JP (1) JPS493877B1 (en)
CH (1) CH534930A (en)
DE (1) DE1930597C3 (en)
GB (1) GB1245690A (en)
NL (1) NL6909151A (en)
SE (1) SE351338B (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3869083A (en) * 1969-07-24 1975-03-04 Arthur G Malmon Methods and apparatus for determining the number of objects in an assemblage
US3699319A (en) * 1971-03-10 1972-10-17 Robert H Berg Average volume digital computer and digital volume totalizer for cells and particles
CH549210A (en) * 1972-09-14 1974-05-15 Contraves Ag METHOD AND METER FOR DETERMINING THE TRUE AVERAGE VOLUME OF PARTICLES SUSPENDED IN AN ELECTROLYTICALLY CONDUCTIVE LIQUID.
US3920969A (en) * 1974-01-31 1975-11-18 Robert E Berglas Digital glucose analyzer
JPS5248158U (en) * 1975-10-02 1977-04-06
US4063309A (en) * 1976-09-16 1977-12-13 Hycel, Inc. Mean corpuscular volume measuring apparatus and method
US4203029A (en) * 1978-03-06 1980-05-13 Artek Systems Corporation Automatic object counter
US4447883A (en) * 1981-05-26 1984-05-08 Technicon Instruments Corporation Coincidence-error correcting apparatus and method
US4510438A (en) * 1982-02-16 1985-04-09 Coulter Electronics, Inc. Coincidence correction in particle analysis system
US5247461A (en) * 1991-07-30 1993-09-21 Particle Data, Inc. Method and apparatus for coincidence correction in electrozone particle sensing

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1004759A (en) * 1963-04-30 1965-09-15 Smith & Sons Ltd S Improvements in or relating to digital systems of the kind for providing an output representation of the value of a predetermined dependent variable
NL137001C (en) * 1965-10-20 1900-01-01

Also Published As

Publication number Publication date
DE1930597A1 (en) 1970-01-22
DE1930597B2 (en) 1974-10-24
DE1930597C3 (en) 1975-06-12
SE351338B (en) 1972-11-20
US3626164A (en) 1971-12-07
JPS493877B1 (en) 1974-01-29
CH534930A (en) 1973-03-15
NL6909151A (en) 1969-12-23

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