GB1216635A - Improvements in and relating to particle counters - Google Patents
Improvements in and relating to particle countersInfo
- Publication number
- GB1216635A GB1216635A GB1424969A GB1424969A GB1216635A GB 1216635 A GB1216635 A GB 1216635A GB 1424969 A GB1424969 A GB 1424969A GB 1424969 A GB1424969 A GB 1424969A GB 1216635 A GB1216635 A GB 1216635A
- Authority
- GB
- United Kingdom
- Prior art keywords
- aperture
- liquid
- holder
- pump
- counting particles
- 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
Links
- 239000002245 particle Substances 0.000 title abstract 3
- 239000007788 liquid Substances 0.000 abstract 6
- 238000004140 cleaning Methods 0.000 abstract 1
- 238000006073 displacement reaction Methods 0.000 abstract 1
- 239000010979 ruby Substances 0.000 abstract 1
- 229910001750 ruby Inorganic materials 0.000 abstract 1
- 238000013022 venting Methods 0.000 abstract 1
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
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 Analyzing Materials By The Use Of Electric Means (AREA)
- Investigating Or Analysing Biological Materials (AREA)
Abstract
1,216,635. Counting particles in liquids. CONTRAVES A.G. 18 March, 1969 [5 April, 1968; 7 Feb., 1969], No. 14249/69. Heading G4D. [Also in Division G1] In apparatus for counting particles in a liquid passing through an aperture by detecting changes in electrical resistance the aperture is formed in a part which is readily changeable. A chemically inert element 41 such as ruby has an aperture 40 through which the test liquid is drawn by the action of a pump 34<SP>1</SP>. A counter 68, responsive to changes of resistance between electrodes 12 and 21, becomes operative when the liquid. level intercepts a light beam 63 and stops when the level reaches 64. At this point, a control circuit 67<SP>1</SP> reverses the pump 34<SP>1</SP> which exhausts the metered liquid through a valve 37. The element 41 is mounted in a holder 4 which can be changed to use an aperture of different size. Several elements 41 may be mounted in a holder which is displaceable linearly or in rotary manner so as to select an aperture of the required size, any displacement venting the metering tube for cleaning purposes (Figs. 2, 4, 5, not shown). Instead of drawing liquid from an open vessel 5 the apparatus may have a needle (Fig. 2, not shown) for drawing from a closed vessel.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH514068A CH481431A (en) | 1968-04-05 | 1968-04-05 | Particle counter |
| CH189669A CH497003A (en) | 1968-04-05 | 1969-02-07 | Particle counting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1216635A true GB1216635A (en) | 1970-12-23 |
Family
ID=25688946
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1424969A Expired GB1216635A (en) | 1968-04-05 | 1969-03-18 | Improvements in and relating to particle counters |
Country Status (5)
| Country | Link |
|---|---|
| CH (1) | CH497003A (en) |
| DE (1) | DE1912056C3 (en) |
| FR (1) | FR2005602A1 (en) |
| GB (1) | GB1216635A (en) |
| SE (1) | SE352465B (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL240601A (en) * | 1958-12-29 | |||
| US3165692A (en) * | 1961-05-15 | 1965-01-12 | Technicon Instr | Continuously operable apparatus and method for counting particles in successive portions of a flowing fluid stream |
| BE632672A (en) * | 1962-05-26 | |||
| NL137000C (en) * | 1964-03-26 |
-
1969
- 1969-02-07 CH CH189669A patent/CH497003A/en not_active IP Right Cessation
- 1969-03-10 DE DE19691912056 patent/DE1912056C3/en not_active Expired
- 1969-03-18 GB GB1424969A patent/GB1216635A/en not_active Expired
- 1969-03-31 FR FR6909695A patent/FR2005602A1/fr not_active Withdrawn
- 1969-04-02 SE SE471669A patent/SE352465B/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| SE352465B (en) | 1972-12-27 |
| DE1912056B2 (en) | 1972-12-14 |
| DE1912056C3 (en) | 1973-07-05 |
| CH497003A (en) | 1970-09-30 |
| DE1912056A1 (en) | 1969-10-16 |
| FR2005602A1 (en) | 1969-12-12 |
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