GB1216752A - Particle counting device - Google Patents

Particle counting device

Info

Publication number
GB1216752A
GB1216752A GB596/68A GB59668A GB1216752A GB 1216752 A GB1216752 A GB 1216752A GB 596/68 A GB596/68 A GB 596/68A GB 59668 A GB59668 A GB 59668A GB 1216752 A GB1216752 A GB 1216752A
Authority
GB
United Kingdom
Prior art keywords
liquid
counting
chamber
pressure
electrode
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
GB596/68A
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.)
Medicor Muvek
Original Assignee
Medicor Muvek
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 Medicor Muvek filed Critical Medicor Muvek
Publication of GB1216752A publication Critical patent/GB1216752A/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
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Biochemistry (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Dispersion Chemistry (AREA)
  • Investigating Or Analysing Biological Materials (AREA)
  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
  • Sampling And Sample Adjustment (AREA)

Abstract

1,216,752. Counting particles. MEDICOR MUVEK. Jan. 4, 1968 [Jan. 6, 1967], No. 596/68. Heading G1N. In apparatus for counting particles, e.g. blood corpuscles, in a liquid suspension by counting pulses due to the charge of resistance between electrodes 13, 14 as particles suspended in the liquid pass through an aperture 3, the liquid is sucked into or pushed out of the liquid volume measuring chamber 9 by altering the pressure of the air in chamber 10. Initially, the liquid might be at level 18, an incandescent filament 11 is connected to a source of electric current to increase the pressure in the chamber 10 thereby driving the liquid level below the lower end of electrode 7, the excess liquid leaving the apparatus through a non-return valve 16. The current is then switched off and as the pressure in chamber 10 drops, liquid is sucked from vessel 2 through the aperture 3. Counting is initiated when the liquid level reaches the lower end of electrode 7 and stopped when the liquid level reaches the end of electrode 8. Alternatively, Fig. 2 (not shown), a plunger replaces the filament and photo-electric cells are used to initiate and stop counting. In a third embodiment, Fig. 3 (not shown), a bellows (25) is used to alter the pressure in chamber 10 and counting is carried out when the liquid level is rising and again when the liquid is falling.
GB596/68A 1967-01-06 1968-01-04 Particle counting device Expired GB1216752A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
HUME000828 1967-01-06

Publications (1)

Publication Number Publication Date
GB1216752A true GB1216752A (en) 1970-12-23

Family

ID=10999188

Family Applications (1)

Application Number Title Priority Date Filing Date
GB596/68A Expired GB1216752A (en) 1967-01-06 1968-01-04 Particle counting device

Country Status (7)

Country Link
CH (1) CH476300A (en)
DE (1) DE1698239A1 (en)
DK (1) DK116081B (en)
FR (1) FR1550709A (en)
GB (1) GB1216752A (en)
NL (1) NL162204C (en)
SE (1) SE340707B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0169897A1 (en) * 1984-02-01 1986-02-05 Coulter Electronics Particle analyzing apparatus.
FR2667156A1 (en) * 1990-09-23 1992-03-27 Horiba Ltd Apparatus for measuring a liquid

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3859012A (en) * 1972-08-10 1975-01-07 Coulter Electronics Fluid ejecting mechanism

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0169897A1 (en) * 1984-02-01 1986-02-05 Coulter Electronics Particle analyzing apparatus.
EP0169897A4 (en) * 1984-02-01 1987-10-08 Coulter Electronics Particle analyzing apparatus.
FR2667156A1 (en) * 1990-09-23 1992-03-27 Horiba Ltd Apparatus for measuring a liquid

Also Published As

Publication number Publication date
CH476300A (en) 1969-07-31
NL162204C (en) 1980-04-15
FR1550709A (en) 1968-12-20
DK116081B (en) 1969-12-08
DE1698239C3 (en) 1975-01-30
NL6717845A (en) 1968-07-08
SE340707B (en) 1971-11-29
DE1698239B2 (en) 1974-06-12
DE1698239A1 (en) 1972-12-14
NL162204B (en) 1979-11-15

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