GB645576A - 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
GB645576A
GB645576A GB26082/48A GB2608248A GB645576A GB 645576 A GB645576 A GB 645576A GB 26082/48 A GB26082/48 A GB 26082/48A GB 2608248 A GB2608248 A GB 2608248A GB 645576 A GB645576 A GB 645576A
Authority
GB
United Kingdom
Prior art keywords
chambers
infra
detecting
gives rise
filled
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
GB26082/48A
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 GB26082/48A priority Critical patent/GB645576A/en
Publication of GB645576A publication Critical patent/GB645576A/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:0645576/III/1> A gas analyser of the type wherein infra-red radiation is passed through a pair of gas-filled tubes B, B1, one of them, B1, containing the test sample, into a pair of detecting chambers C, C1 separated by a metal diaphragm D1 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 tube B1 gives rise to a difference in the absorption and therefore temperature and pressure in chambers C, C1, whereupon the diaphragm deforms and gives rise to capacity changes in relation to an insulated perforated plate E1, is characterized by the provision of one or more pairs of additional detecting chambers C2, C3 filled with different gases, thereby enabling the analyser to be employed for detecting the presence of several constituents in the test sample. The capacity changes are amplified electronically and measured on a meter calibrated in gas concentration. The condensers may be used simultaneously with separate amplifiers or successively with a common amplifier. A rotating shutter F interrupts the radiation and gives rise to pressure pulses in the detecting chambers.
GB26082/48A 1948-10-06 1948-10-06 Improvements in or relating to infra-red gas analysing apparatus Expired GB645576A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB26082/48A GB645576A (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
GB26082/48A GB645576A (en) 1948-10-06 1948-10-06 Improvements in or relating to infra-red gas analysing apparatus

Publications (1)

Publication Number Publication Date
GB645576A true GB645576A (en) 1950-11-01

Family

ID=10238067

Family Applications (1)

Application Number Title Priority Date Filing Date
GB26082/48A Expired GB645576A (en) 1948-10-06 1948-10-06 Improvements in or relating to infra-red gas analysing apparatus

Country Status (1)

Country Link
GB (1) GB645576A (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2709751A (en) * 1951-01-17 1955-05-31 Foxboro Co Infrared concentrometer
US2758216A (en) * 1950-12-11 1956-08-07 Onera (Off Nat Aerospatiale) Apparatus for performing quantitative analysis of gaseous mixtures
DE967633C (en) * 1950-12-11 1957-11-28 Onera (Off Nat Aerospatiale) Multiple analyzer, especially for gas mixtures
US2898800A (en) * 1954-07-23 1959-08-11 Bergson Gustav Gas analyzing system of the radiant energy absorption type
US2924713A (en) * 1956-01-18 1960-02-09 Beckman Instruments Inc Instruments
US2951938A (en) * 1953-04-24 1960-09-06 Parsons C A & Co Ltd Infra-red analysing apparatus
US2951939A (en) * 1955-05-07 1960-09-06 Onera (Off Nat Aerospatiale) Devices for analyzing fluid mixtures by absorption of rays
US2957076A (en) * 1957-08-29 1960-10-18 Texaco Inc Fuel-air ratio determination by infrared analysis of exhaust gases
US3123295A (en) * 1957-01-02 1964-03-03 Means for analysing combustion products
DE2505006A1 (en) * 1975-02-06 1977-12-08 Horiba Ltd INFRARED GAS ANALYZER
EP0394870A1 (en) * 1989-04-25 1990-10-31 Siemens Aktiengesellschaft Non-dispersive infrared gas analyzer

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2758216A (en) * 1950-12-11 1956-08-07 Onera (Off Nat Aerospatiale) Apparatus for performing quantitative analysis of gaseous mixtures
DE967633C (en) * 1950-12-11 1957-11-28 Onera (Off Nat Aerospatiale) Multiple analyzer, especially for gas mixtures
US2709751A (en) * 1951-01-17 1955-05-31 Foxboro Co Infrared concentrometer
US2951938A (en) * 1953-04-24 1960-09-06 Parsons C A & Co Ltd Infra-red analysing apparatus
US2898800A (en) * 1954-07-23 1959-08-11 Bergson Gustav Gas analyzing system of the radiant energy absorption type
US2951939A (en) * 1955-05-07 1960-09-06 Onera (Off Nat Aerospatiale) Devices for analyzing fluid mixtures by absorption of rays
US2924713A (en) * 1956-01-18 1960-02-09 Beckman Instruments Inc Instruments
DE1109418B (en) * 1956-01-18 1961-06-22 Beckman Instruments Inc Non-dispersive infrared analyzer with positive filtering
US3123295A (en) * 1957-01-02 1964-03-03 Means for analysing combustion products
US2957076A (en) * 1957-08-29 1960-10-18 Texaco Inc Fuel-air ratio determination by infrared analysis of exhaust gases
DE2505006A1 (en) * 1975-02-06 1977-12-08 Horiba Ltd INFRARED GAS ANALYZER
EP0394870A1 (en) * 1989-04-25 1990-10-31 Siemens Aktiengesellschaft Non-dispersive infrared gas analyzer

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