GB1328075A - Determination of fine dust concentrations - Google Patents
Determination of fine dust concentrationsInfo
- Publication number
- GB1328075A GB1328075A GB4489971A GB4489971A GB1328075A GB 1328075 A GB1328075 A GB 1328075A GB 4489971 A GB4489971 A GB 4489971A GB 4489971 A GB4489971 A GB 4489971A GB 1328075 A GB1328075 A GB 1328075A
- Authority
- GB
- United Kingdom
- Prior art keywords
- analyser
- receiver
- degrees
- dust concentration
- photo
- 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
Classifications
-
- 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
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
1328075 Determining dust concentration BERGWERKSVERBAND GmbH 27 Sept 1971 [21 Oct 1970] 44899/71 Heading G1A In an apparatus for determining the dust concentration in an atmosphere a beam of radiation from a source 1 in the wavelength range 800-1000 mm is directed as shown into a chamber 13 and encounters dust particles which scatter the incident beam 5 causing a stray light beam 6. The beam 6 is that portion of the scattered light which diverges out at an angle between 60 degrees and 80 degrees (preferably 70 degrees) from the path of the primary beam 5. The stray light is directed as shown to a receiver 12 which also receives a comparison beam 10 from the light source. The receiver 12 may comprise one photo-electric device which alternately receives each beam, or, it may comprise two photo-electric devices which each receive a corresponding beam. The output from the receiver is fed to a compensator circuit and thence to a meter 14. The beam 10 passes through an attenuator in the form of two polarization plates 8 so that intensity can be selectively altered by rotation of an analyser 9. The analyser 9 is rotated until the meter 14 indicates that the beams are equal in intensity and the angular rotation of the analyser thereby provides a measure of the scattered light and thus a measure of the dust concentration.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19702051546 DE2051546A1 (en) | 1970-10-21 | 1970-10-21 | Device for the determination of fine dust concentrations |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1328075A true GB1328075A (en) | 1973-08-30 |
Family
ID=5785672
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4489971A Expired GB1328075A (en) | 1970-10-21 | 1971-09-27 | Determination of fine dust concentrations |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPS5221381B1 (en) |
| DE (1) | DE2051546A1 (en) |
| FR (1) | FR2131230A5 (en) |
| GB (1) | GB1328075A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2260313C2 (en) * | 1972-12-09 | 1982-07-29 | Bergwerksverband Gmbh, 4300 Essen | Method and device for the determination of fine dust concentrations |
| EP0208646B1 (en) * | 1985-07-05 | 1991-01-23 | Bergwerksverband GmbH | Stationary tyndallometer |
-
1970
- 1970-10-21 DE DE19702051546 patent/DE2051546A1/en active Pending
-
1971
- 1971-09-27 GB GB4489971A patent/GB1328075A/en not_active Expired
- 1971-10-13 FR FR7136731A patent/FR2131230A5/fr not_active Expired
- 1971-10-20 JP JP8252671A patent/JPS5221381B1/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE2051546A1 (en) | 1972-05-04 |
| JPS5221381B1 (en) | 1977-06-10 |
| FR2131230A5 (en) | 1972-11-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PE20 | Patent expired after termination of 20 years |