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GB1402440A - Infra-red gas analyser - Google Patents

Infra-red gas analyser

Info

Publication number
GB1402440A
GB1402440A GB5752872A GB5752872A GB1402440A GB 1402440 A GB1402440 A GB 1402440A GB 5752872 A GB5752872 A GB 5752872A GB 5752872 A GB5752872 A GB 5752872A GB 1402440 A GB1402440 A GB 1402440A
Authority
GB
United Kingdom
Prior art keywords
detector
filters
wavelength
gases
pass
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
Application number
GB5752872A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BLMC Ltd
Original Assignee
British Leyland Motor Corp Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by British Leyland Motor Corp Ltd filed Critical British Leyland Motor Corp Ltd
Priority to GB5752872A priority Critical patent/GB1402440A/en
Publication of GB1402440A publication Critical patent/GB1402440A/en
Expired legal-status Critical Current

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
    • G01N21/25—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
    • G01N21/3504—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing gases, e.g. multi-gas analysis
    • 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
    • G01N21/255—Details, e.g. use of specially adapted sources, lighting or optical systems

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)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

1402440 Infrared gas analyzer BRITISH LEYLAND MOTOR CORP Ltd 7 Dec 1973 [13 Dec 1972] 57528/72 Heading G1A In an infrared gas analyzer for detecting several gases in a sample, a series of infrared sources 15, 16, 17 are energized in sequence by an electronic drive unit 22 so that radiation will pass in sequence through a corresponding series of band pass filters and via a sample chamber 11 through which the gas to be tested flows. The filters are such that one passes a wavelength that is substantially unabsorbed by any of the gases present, while each of the other filters pass a different wavelength each of which is liable to be absorbed to some extent by a different one of the gases whose presence is being detected and measured. A detector 21 receives the radiation that has passed through the chamber and the detector's output is fed to an electronic processing circuit 23 that is synchronized by the drive unit 22. The electronic processing circuit 23 compares in turn the detector's output signal for the two wavelengths that are liable to be absorbed with the output corresponding to the unabsorbing wavelength, and the result is shown on indicators 24 and 25.
GB5752872A 1972-12-13 1972-12-13 Infra-red gas analyser Expired GB1402440A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB5752872A GB1402440A (en) 1972-12-13 1972-12-13 Infra-red gas analyser

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5752872A GB1402440A (en) 1972-12-13 1972-12-13 Infra-red gas analyser

Publications (1)

Publication Number Publication Date
GB1402440A true GB1402440A (en) 1975-08-06

Family

ID=10479404

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5752872A Expired GB1402440A (en) 1972-12-13 1972-12-13 Infra-red gas analyser

Country Status (1)

Country Link
GB (1) GB1402440A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2264170A (en) * 1992-02-13 1993-08-18 Isis Innovation Infra-red absorption gas detector
EP0555508A1 (en) * 1990-10-01 1993-08-18 Krieg, Gunther, Prof.Dr.Ing. Method and device for simultaneous determination of concentrations of molecular compounds in gases and liquids
GB2301665A (en) * 1995-06-03 1996-12-11 Draegerwerk Ag Measuring gas concentration using infrared absorbtion

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0555508A1 (en) * 1990-10-01 1993-08-18 Krieg, Gunther, Prof.Dr.Ing. Method and device for simultaneous determination of concentrations of molecular compounds in gases and liquids
GB2264170A (en) * 1992-02-13 1993-08-18 Isis Innovation Infra-red absorption gas detector
GB2301665A (en) * 1995-06-03 1996-12-11 Draegerwerk Ag Measuring gas concentration using infrared absorbtion
GB2301665B (en) * 1995-06-03 1997-04-23 Draegerwerk Ag Measuring device using infrared absorption

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee