http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-2102942-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_c5ed4f178583c34e27eabf0d899c20b4 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01N21-3504 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01N21-35 |
| filingDate | 1981-11-16^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ce303fc304115c789a443c2a4cf0c131 |
| publicationDate | 1983-02-09^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-2102942-A |
| titleOfInvention | Spectrometric gas analysis |
| abstract | Apparatus for determining the concentration of a gas, particularly a hydrocarbon gas, in the atmosphere employs a non-dispersive infra-red spectrometer priciple of transmitting a beam of infra-red radiation through the atmosphere and examining the signals produced as a result of its detection at a wavelength lambda 1, at which the sought-for gas absorbs radiation, and at a wavelength lambda 2 to which the gas is transparent. The detector 25 emits a pulsed beam containing the two wavelengths alternately in sequence from source means 27, 28 associated with the respective wavelengths. The radiation source in each source means is a gallium arsenide l.e.d. 29, 30 emitting at a shorter wavelength to excite a phosphor 32, which emits at the wavelength associated with that source means. A filter 33, 34 may be employed to limit radiation to a narrow band at the associated wavelength. By employing two electrically switched sources rugged and simple apparatus is possible. <IMAGE> |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2011042628-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/FR-2951270-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5444441-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0584519-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-2274163-B http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-2273155-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-2274163-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-9302367-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-9913303-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-2273155-B http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5387979-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8779363-B2 |
| priorityDate | 1981-07-03^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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