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CA937289A - Particle size analyzing apparatus and method using threshold level control - Google Patents

Particle size analyzing apparatus and method using threshold level control

Info

Publication number
CA937289A
CA937289A CA106286A CA106286A CA937289A CA 937289 A CA937289 A CA 937289A CA 106286 A CA106286 A CA 106286A CA 106286 A CA106286 A CA 106286A CA 937289 A CA937289 A CA 937289A
Authority
CA
Canada
Prior art keywords
particle size
threshold level
level control
analyzing apparatus
size analyzing
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
CA106286A
Other languages
English (en)
Other versions
CA106286S (en
Inventor
H. Coulter Wallace
R. Hogg Walter
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of CA937289A publication Critical patent/CA937289A/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
    • 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)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Dispersion Chemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analysing Biological Materials (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
CA106286A 1970-05-25 1971-02-25 Particle size analyzing apparatus and method using threshold level control Expired CA937289A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US4023170A 1970-05-25 1970-05-25

Publications (1)

Publication Number Publication Date
CA937289A true CA937289A (en) 1973-11-20

Family

ID=21909862

Family Applications (1)

Application Number Title Priority Date Filing Date
CA106286A Expired CA937289A (en) 1970-05-25 1971-02-25 Particle size analyzing apparatus and method using threshold level control

Country Status (12)

Country Link
US (1) US3757213A (fr)
BE (1) BE763433A (fr)
CA (1) CA937289A (fr)
CH (1) CH535954A (fr)
DE (1) DE2109046A1 (fr)
ES (1) ES388642A1 (fr)
FR (1) FR2092378A5 (fr)
GB (1) GB1330587A (fr)
IL (1) IL36295A (fr)
NL (1) NL7102426A (fr)
SE (1) SE369119B (fr)
ZA (1) ZA711210B (fr)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3810011A (en) * 1970-05-25 1974-05-07 Coulter Electronics Apparatus and method for analyzing the particle volume distribution for a plurality of particles of different size in a quantity of liquid
US3973189A (en) * 1972-05-15 1976-08-03 General Science Corporation Hematology system
US3828260A (en) * 1973-04-02 1974-08-06 Royco Instr Inc Hematocrit measuring apparatus
US3863056A (en) * 1973-06-29 1975-01-28 Coulter Electronics Method and apparatus for multichannel voting
US3982183A (en) * 1975-02-20 1976-09-21 Coulter Electronics, Inc. Particle sizing apparatus
US4110604A (en) * 1976-11-04 1978-08-29 Becton, Dickinson And Company Particle density measuring system
US4450435A (en) * 1981-11-30 1984-05-22 Bobby Dencil James Analog debris alarm
US4704364A (en) * 1984-05-18 1987-11-03 Coulter Electronics, Inc. Hematology control compositions for three populations of leukocytes; and methods for their preparation and use in whole blood control systems
US5204884A (en) * 1991-03-18 1993-04-20 University Of Rochester System for high-speed measurement and sorting of particles
DE60206859T2 (de) * 2001-08-07 2006-05-24 Sysmex Corp. Vorrichtung und Verfahren zur Messung von Teilchengrössen
EP1664737B1 (fr) * 2003-09-02 2016-03-30 Koninklijke Philips N.V. Analyseur d'amplitude d'impulsions
US7928718B2 (en) * 2004-10-01 2011-04-19 Chempaq A/S Method for calibrating a particle counting apparatus
US20110027825A1 (en) * 2008-03-03 2011-02-03 Chempaq A/S High resolution classification

Also Published As

Publication number Publication date
SE369119B (fr) 1974-08-05
ZA711210B (en) 1972-09-27
ES388642A1 (es) 1974-02-16
DE2109046A1 (de) 1971-12-02
NL7102426A (fr) 1971-11-29
IL36295A (en) 1973-11-28
CH535954A (fr) 1973-04-15
IL36295A0 (en) 1971-04-28
US3757213A (en) 1973-09-04
GB1330587A (en) 1973-09-19
FR2092378A5 (fr) 1972-01-21
BE763433A (fr) 1971-08-25

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