GB1186957A - Improvements in or relating to the Determination of the Concentration of Carbon Monoxide in Gas Mixtures - Google Patents
Improvements in or relating to the Determination of the Concentration of Carbon Monoxide in Gas MixturesInfo
- Publication number
- GB1186957A GB1186957A GB4850768A GB4850768A GB1186957A GB 1186957 A GB1186957 A GB 1186957A GB 4850768 A GB4850768 A GB 4850768A GB 4850768 A GB4850768 A GB 4850768A GB 1186957 A GB1186957 A GB 1186957A
- Authority
- GB
- United Kingdom
- Prior art keywords
- source
- carbon monoxide
- radiation
- detector
- concentration
- 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
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title abstract 3
- 229910002091 carbon monoxide Inorganic materials 0.000 title abstract 3
- 239000000203 mixture Substances 0.000 title 1
- 230000005855 radiation Effects 0.000 abstract 4
- 239000007789 gas Substances 0.000 abstract 3
- 238000005259 measurement Methods 0.000 abstract 2
- 239000004065 semiconductor Substances 0.000 abstract 2
- 229910000673 Indium arsenide Inorganic materials 0.000 abstract 1
- 238000010521 absorption reaction Methods 0.000 abstract 1
- 238000000862 absorption spectrum Methods 0.000 abstract 1
- 238000004868 gas analysis Methods 0.000 abstract 1
- WPYVAWXEWQSOGY-UHFFFAOYSA-N indium antimonide Chemical compound [Sb]#[In] WPYVAWXEWQSOGY-UHFFFAOYSA-N 0.000 abstract 1
- RPQDHPTXJYYUPQ-UHFFFAOYSA-N indium arsenide Chemical compound [In]#[As] RPQDHPTXJYYUPQ-UHFFFAOYSA-N 0.000 abstract 1
- GGYFMLJDMAMTAB-UHFFFAOYSA-N selanylidenelead Chemical compound [Pb]=[Se] GGYFMLJDMAMTAB-UHFFFAOYSA-N 0.000 abstract 1
- OCGWQDWYSQAFTO-UHFFFAOYSA-N tellanylidenelead Chemical compound [Pb]=[Te] OCGWQDWYSQAFTO-UHFFFAOYSA-N 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
Abstract
1,186,957. Infrared gas analysis. SIEMENS A.G. Oct. 14, 1968 [Oct. 16, 1967], No.48507/68. Heading G1A. The concentration of carbon monoxide in exhaust gases is measured by determining the absorption by the gases of monochromatic infrared radiation from an electro-luminescent semiconductor source. Fig.2 shows a two-path system in which the measurement path comprises a pulsed electroluminescent or laser diode 23, supplied from unit 4, a through-flow chamber 14 for exhaust gases, and an infrared sensitive semi-conductor detector 5, feeding an amplifier 7, rectifier 8 and meter 9 or control means 10 for adjusting the carburretor of the engine producing the exhaust under examination. The diode 23 may be doped indium arsenide - indium antimonide body and emits radiation corresponding to a main or secondary line in the absorption spectrum of carbon monoxide. The detector 5 may be of indium antimonide, lead selenide or lead telluride. The other radiation path uses a similar detector 19 and similar circuitry and is used to maintain the wavelength of the radiation emitted by the source constant, by control of the temperature of the source, or the voltage supplied thereto. A semi-silvered mirror 18 splits the light from source 23 into two beams. In the simpler arrangement of Fig. 1 (not shown) only the measurement path is present.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DES0112405 | 1967-10-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1186957A true GB1186957A (en) | 1970-04-08 |
Family
ID=7531757
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4850768A Expired GB1186957A (en) | 1967-10-16 | 1968-10-14 | Improvements in or relating to the Determination of the Concentration of Carbon Monoxide in Gas Mixtures |
Country Status (4)
| Country | Link |
|---|---|
| CH (1) | CH484425A (en) |
| FR (1) | FR1588321A (en) |
| GB (1) | GB1186957A (en) |
| NL (1) | NL6810428A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3734631A (en) * | 1971-05-28 | 1973-05-22 | Hewlett Packard Co | Nondispersive infrared gas analyzer employing solid state emitters and photodetectors |
| GB2186076A (en) * | 1986-01-30 | 1987-08-05 | Cogent Ltd | Chemical monitor |
| GB2208707B (en) * | 1987-07-31 | 1991-09-18 | Sieger Ltd | Gas analyser |
-
1968
- 1968-07-23 NL NL6810428A patent/NL6810428A/xx unknown
- 1968-10-09 FR FR1588321D patent/FR1588321A/fr not_active Expired
- 1968-10-14 GB GB4850768A patent/GB1186957A/en not_active Expired
- 1968-10-15 CH CH1539568A patent/CH484425A/en not_active IP Right Cessation
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3734631A (en) * | 1971-05-28 | 1973-05-22 | Hewlett Packard Co | Nondispersive infrared gas analyzer employing solid state emitters and photodetectors |
| GB2186076A (en) * | 1986-01-30 | 1987-08-05 | Cogent Ltd | Chemical monitor |
| GB2186076B (en) * | 1986-01-30 | 1990-02-14 | Cogent Ltd | Chemical monitor |
| GB2208707B (en) * | 1987-07-31 | 1991-09-18 | Sieger Ltd | Gas analyser |
Also Published As
| Publication number | Publication date |
|---|---|
| FR1588321A (en) | 1970-04-10 |
| CH484425A (en) | 1970-01-15 |
| NL6810428A (en) | 1969-04-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |