GB634453A - Improvements in gas detection and analysis - Google Patents
Improvements in gas detection and analysisInfo
- Publication number
- GB634453A GB634453A GB2606047A GB2606047A GB634453A GB 634453 A GB634453 A GB 634453A GB 2606047 A GB2606047 A GB 2606047A GB 2606047 A GB2606047 A GB 2606047A GB 634453 A GB634453 A GB 634453A
- Authority
- GB
- United Kingdom
- Prior art keywords
- chambers
- gas
- pressure
- capillary
- infra
- 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
- 238000001514 detection method Methods 0.000 title abstract 2
- 239000013078 crystal Substances 0.000 abstract 1
- 230000000694 effects Effects 0.000 abstract 1
- 230000007935 neutral effect Effects 0.000 abstract 1
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
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/37—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light using pneumatic detection
Landscapes
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (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)
- Examining Or Testing Airtightness (AREA)
Abstract
<PICT:0634453/III/1> In known gas analysing apparatus infra-red rays from a radiating source 2 are chopped by a wheel 18, and passed through chambers 3, 4 one containing the gas to be analysed and the other a neutral or standard gas, to detecting chambers 5, 6 filled with the gas for which the contents of chamber 3 are being examined. If any of the same gas as is contained in chambers 5, 6 is present in chamber 3, part of the energy of a particular band of infra-red rays is absorbed so that uneven comparison of the gas in chambers 5, 6 results. The resulting pressure difference deforms a plate 13 forming one of the electrodes of a condenser or operating a moving coil or piezo crystal. To reduce or indicate the effect of leaks in chambers 5 and 6 the contents of which are well below atmospheric pressure, the chambers are according to the present invention joined by a capillary leak in a diaphragm 13, and through a further capillary tube to a pressure-gauge 17. Chambers 5 and 6 may be joined through a capillary leak to a reservoir of gas at the pressure of the detection chambers, or as shown, the whole apparatus may be surrounded by a reservoir 19. The Provisional Specification states that the capillary tubes may be rolled flat or drawn out.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2606047A GB634453A (en) | 1947-09-25 | 1947-09-25 | Improvements in gas detection and analysis |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2606047A GB634453A (en) | 1947-09-25 | 1947-09-25 | Improvements in gas detection and analysis |
Publications (1)
Publication Number | Publication Date |
---|---|
GB634453A true GB634453A (en) | 1950-03-22 |
Family
ID=10237728
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2606047A Expired GB634453A (en) | 1947-09-25 | 1947-09-25 | Improvements in gas detection and analysis |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB634453A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2844729A (en) * | 1953-06-19 | 1958-07-22 | Hartmann & Braun Ag | Device for the quantitative determination of gaseous infrared-absorbing material |
DE976713C (en) * | 1953-06-19 | 1964-03-19 | Hartmann & Braun Ag | Receiving device for a device for the analysis of mixtures of substances by means of infrared rays |
EP0198995A2 (en) * | 1985-04-26 | 1986-10-29 | Hartmann & Braun Aktiengesellschaft | Infrared gas analyser |
-
1947
- 1947-09-25 GB GB2606047A patent/GB634453A/en not_active Expired
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2844729A (en) * | 1953-06-19 | 1958-07-22 | Hartmann & Braun Ag | Device for the quantitative determination of gaseous infrared-absorbing material |
DE976713C (en) * | 1953-06-19 | 1964-03-19 | Hartmann & Braun Ag | Receiving device for a device for the analysis of mixtures of substances by means of infrared rays |
EP0198995A2 (en) * | 1985-04-26 | 1986-10-29 | Hartmann & Braun Aktiengesellschaft | Infrared gas analyser |
EP0199365A2 (en) * | 1985-04-26 | 1986-10-29 | Hartmann & Braun Aktiengesellschaft | Infrared gas analyser |
EP0198995A3 (en) * | 1985-04-26 | 1987-12-16 | Hartmann & Braun Aktiengesellschaft | Infrared gas analyser |
EP0199365A3 (en) * | 1985-04-26 | 1987-12-23 | Hartmann & Braun Aktiengesellschaft | Infrared gas analyser |
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