GB722947A - Improvements relating to measuring apparatus for estimating the number of particles in a suspension - Google Patents
Improvements relating to measuring apparatus for estimating the number of particles in a suspensionInfo
- Publication number
- GB722947A GB722947A GB21070/52A GB2107052A GB722947A GB 722947 A GB722947 A GB 722947A GB 21070/52 A GB21070/52 A GB 21070/52A GB 2107052 A GB2107052 A GB 2107052A GB 722947 A GB722947 A GB 722947A
- Authority
- GB
- United Kingdom
- Prior art keywords
- light
- angle
- cells
- cell
- mirror
- 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 4
- 239000000725 suspension Substances 0.000 title 1
- 238000010079 rubber tapping Methods 0.000 abstract 2
- 238000010521 absorption reaction Methods 0.000 abstract 1
- 230000031700 light absorption Effects 0.000 abstract 1
- 238000005259 measurement Methods 0.000 abstract 1
- 230000003287 optical effect Effects 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
- G01N15/06—Investigating concentration of particle suspensions
-
- 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
- G01N21/51—Scattering, i.e. diffuse reflection within a body or fluid inside a container, e.g. in an ampoule
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)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
722,947. Examining solutions photo-electrically. LOESCHCKE, H. H., and WEVER, R. Aug. 21, 1952 [Aug. 21, 1951], No. 21070/52. Addition to 688,653 and 688,945. Class 40 (3). The invention of the parent Specification in which the number of particles in a solution is estimated by measuring the proportion of light diffracted outside an angle 2#<SP>1</SP> where sin #<SP>1</SP>#0.73 #/fm, fm being the predominating projected area of the individual particle is now modified so that one photocell responds to the light outside this angle and another to the light within the angle, the outputs of the cells being applied in opposition to each other to a common indicating circuit. As shown, light from a source 1 passes through a circular diaphragm 1a, is made monochromatic by a filter 3, and is focused by a lens 2 in a converging beam through specimen carrier 4. The beam of light from the lens converges in a point image of the source on to a concave mirror 5 which subtends an angle #<SP>1</SP> at the centre 0 of the specimen carrier, while a larger concave mirror 6 subtends an angle #<SP>2</SP> at 0, #<SP>2</SP> being not less than four times #<SP>1</SP>. The small mirror 5 is arranged in front of the large mirror 6 and as nearly as possible concentrically with it, but the optical axes of the mirrors are inclined in opposite directions to the main beam. Thus light within the angle #<SP>1</SP> is reflected to photo-cell 7 while light between #<SP>1</SP> and #<SP>2</SP> is reflected to cell 8. The outputs of the two cells are supplied to potentiometers 9 and 10 respectively (Fig. 2), and cell 7 is used for the measurement, tapping 12 being adjusted until meter 11 reads zero when the position of the tapping indicates particle concentration. Potentiometer 10 is used to reset the apparatus to take account of variation in cell characteristics. The potentiometers may be replaced by means for stopping down the light reaching one of the cells. The apparatus may be used to indicate total light absorption by replacing filters 3 by a diffusing plate, the cells being connected in parallel so that they both feed the same potentiometer. A variable shutter may be used for adjustment of the absorption calibrations.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE688653X | 1949-08-22 | ||
| DE297254X | 1949-08-22 | ||
| DE141150X | 1950-11-14 | ||
| DE305644X | 1951-08-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB722947A true GB722947A (en) | 1955-02-02 |
Family
ID=27430521
Family Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB20685/50A Expired GB688653A (en) | 1949-08-22 | 1950-08-21 | Improvements relating to photo-electric measuring apparatus |
| GB29522/50A Expired GB688945A (en) | 1949-08-22 | 1950-12-01 | Improvements relating to measuring apparatus for estimating the number of particles in a suspension |
| GB21070/52A Expired GB722947A (en) | 1949-08-22 | 1952-08-21 | Improvements relating to measuring apparatus for estimating the number of particles in a suspension |
Family Applications Before (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB20685/50A Expired GB688653A (en) | 1949-08-22 | 1950-08-21 | Improvements relating to photo-electric measuring apparatus |
| GB29522/50A Expired GB688945A (en) | 1949-08-22 | 1950-12-01 | Improvements relating to measuring apparatus for estimating the number of particles in a suspension |
Country Status (4)
| Country | Link |
|---|---|
| CH (3) | CH278998A (en) |
| DE (3) | DE881877C (en) |
| FR (1) | FR1088567A (en) |
| GB (3) | GB688653A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4167335A (en) * | 1977-12-16 | 1979-09-11 | Leeds & Northrup Company | Apparatus and method for linearizing a volume loading measurement utilizing particle scattering |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2816479A (en) * | 1954-07-06 | 1957-12-17 | Du Pont | Particle measurement |
| US2873644A (en) * | 1955-02-08 | 1959-02-17 | American Instr Co Inc | Optical system for the measurement of turbidity |
| US3011346A (en) * | 1957-07-11 | 1961-12-05 | California Research Corp | Apparatus for gravity gradient surveying |
| US3008370A (en) * | 1958-07-21 | 1961-11-14 | Antonjo M Uribe | Photometric apparatus |
| DE1296828B (en) * | 1963-02-18 | 1969-06-04 | Toa Tokushu Denki Kabushiki Ka | Device for measuring the concentration of a colloid |
| US3597087A (en) * | 1968-12-31 | 1971-08-03 | Ball Brothers Res Corp | Sample degradation determining method and apparatus |
| DE2103318B2 (en) * | 1970-01-29 | 1973-10-04 | Beckman Instruments, Inc., Fullerton, Calif. (V.St.A.) | Scatter photometer |
| DE3018021A1 (en) * | 1979-05-16 | 1980-11-27 | Honeywell Inc | OPTICAL SMOKE DETECTOR |
| DE3608552A1 (en) * | 1986-03-14 | 1987-09-17 | Bayer Ag | Nephelometer |
| DE3630292C1 (en) * | 1986-09-05 | 1988-02-11 | Suck Thomas Adolf | Scattered light photometer |
| ES2183984T3 (en) * | 1995-11-30 | 2003-04-01 | Thermo Labsystems Oy | NEFELOMETER |
| SE530896C2 (en) * | 2005-04-01 | 2008-10-14 | Diaspect Medical Ab | Device for determining a blood hemoglobin concentration |
| EP2957896A1 (en) * | 2014-06-17 | 2015-12-23 | Siemens Healthcare Diagnostics Products GmbH | Optical device for guiding a beam of radiation and aperture for integration into the same |
| CN105784552B (en) * | 2014-12-24 | 2019-08-06 | 周志斌 | Particle concentration detection method |
| CN108398363B (en) * | 2017-02-06 | 2022-09-09 | 霍尼韦尔国际公司 | Particulate matter sensor with novel turnover mechanism for forming air flow |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH258050A (en) * | 1944-12-15 | 1948-11-15 | Gmbh Ernst Leitz | Device for measuring the turbidity of a liquid. |
-
1949
- 1949-08-22 CH CH278998D patent/CH278998A/en unknown
- 1949-08-22 DE DEP52666A patent/DE881877C/en not_active Expired
-
1950
- 1950-08-21 GB GB20685/50A patent/GB688653A/en not_active Expired
- 1950-11-14 DE DEL6280A patent/DE913590C/en not_active Expired
- 1950-12-01 GB GB29522/50A patent/GB688945A/en not_active Expired
-
1951
- 1951-07-30 CH CH297254D patent/CH297254A/en unknown
- 1951-08-21 DE DEL9897A patent/DE924173C/en not_active Expired
- 1951-11-14 FR FR1088567D patent/FR1088567A/en not_active Expired
-
1952
- 1952-08-19 CH CH305644D patent/CH305644A/en unknown
- 1952-08-21 GB GB21070/52A patent/GB722947A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4167335A (en) * | 1977-12-16 | 1979-09-11 | Leeds & Northrup Company | Apparatus and method for linearizing a volume loading measurement utilizing particle scattering |
Also Published As
| Publication number | Publication date |
|---|---|
| FR1088567A (en) | 1955-03-08 |
| DE881877C (en) | 1953-07-02 |
| DE913590C (en) | 1954-06-14 |
| CH278998A (en) | 1951-11-15 |
| CH297254A (en) | 1954-03-15 |
| GB688653A (en) | 1953-03-11 |
| GB688945A (en) | 1953-03-18 |
| DE924173C (en) | 1955-02-28 |
| CH305644A (en) | 1955-02-28 |
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