GB645575A - Improvements in or relating to infra-red gas analysing apparatus - Google Patents

Improvements in or relating to infra-red gas analysing apparatus

Info

Publication number
GB645575A
GB645575A GB26081/48A GB2608148A GB645575A GB 645575 A GB645575 A GB 645575A GB 26081/48 A GB26081/48 A GB 26081/48A GB 2608148 A GB2608148 A GB 2608148A GB 645575 A GB645575 A GB 645575A
Authority
GB
United Kingdom
Prior art keywords
gas
sample
test
filled
gives rise
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
GB26081/48A
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.)
CA Parsons and Co Ltd
Original Assignee
CA Parsons and Co 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 CA Parsons and Co Ltd filed Critical CA Parsons and Co Ltd
Priority to GB26081/48A priority Critical patent/GB645575A/en
Publication of GB645575A publication Critical patent/GB645575A/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

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

<PICT:0645575/III/1> In a gas analyser of the type wherein infrared radiation is passed through a pair of gas-filled tubes, one of which contains the test-sample, into a pair of detecting chambers C, Cl separated by a metal diaphragm D and filled with the gaseous constituent to be estimated, such that absorption of a particular infra-red band by the constituent to be detected in the test-sample tube gives rise to a difference in the absorption and therefore temperature and pressure in chambers C, Cl, whereupon the diaphragm deforms and gives rise to capacity changes in relation to an insulated perforated plate E, the single test-sample tube usually employed is replaced by a plurality of axiallyaligned tubes B1, B2, B3 of varying length, the tube of a length appropriate to the concentration range of the constituent to be estimated in the sample gas being used to contain the test-sample and the others being filled with a standard or filter gas. The capacity changes are amplified electronically and measured on a meter calibrated in gas concentration. A rotating shutter F interrupts the radiation and gives rise to pressure pulses in the detecting chambers.
GB26081/48A 1948-10-06 1948-10-06 Improvements in or relating to infra-red gas analysing apparatus Expired GB645575A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB26081/48A GB645575A (en) 1948-10-06 1948-10-06 Improvements in or relating to infra-red gas analysing apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB26081/48A GB645575A (en) 1948-10-06 1948-10-06 Improvements in or relating to infra-red gas analysing apparatus

Publications (1)

Publication Number Publication Date
GB645575A true GB645575A (en) 1950-11-01

Family

ID=10238052

Family Applications (1)

Application Number Title Priority Date Filing Date
GB26081/48A Expired GB645575A (en) 1948-10-06 1948-10-06 Improvements in or relating to infra-red gas analysing apparatus

Country Status (1)

Country Link
GB (1) GB645575A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2811287A1 (en) * 1977-03-24 1978-09-28 Yokogawa Electric Works Ltd INFRARED GAS ANALYZER
DE3243301A1 (en) * 1981-11-26 1983-06-01 Horiba Ltd., Kyoto NON-DISPERSIVE INFRARED GAS ANALYZER

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2811287A1 (en) * 1977-03-24 1978-09-28 Yokogawa Electric Works Ltd INFRARED GAS ANALYZER
DE3243301A1 (en) * 1981-11-26 1983-06-01 Horiba Ltd., Kyoto NON-DISPERSIVE INFRARED GAS ANALYZER

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