GB1505913A - Measuring gas concentrations - Google Patents

Measuring gas concentrations

Info

Publication number
GB1505913A
GB1505913A GB4030975A GB4030975A GB1505913A GB 1505913 A GB1505913 A GB 1505913A GB 4030975 A GB4030975 A GB 4030975A GB 4030975 A GB4030975 A GB 4030975A GB 1505913 A GB1505913 A GB 1505913A
Authority
GB
United Kingdom
Prior art keywords
gas
hence
source
flue gases
black body
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
GB4030975A
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB4030975A priority Critical patent/GB1505913A/en
Publication of GB1505913A publication Critical patent/GB1505913A/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

Abstract

1505913 Infrared gas analyzers STANDARD TELEPHONES & CABLES Ltd 28 Sept 1976 [2 Oct 1975] 40309/75 Heading G1A An infrared gas analyzer has a black body source which is heated sequentially to various predetermined temperatures, and a black body detector which receives the source radiation after passage through the gas mixture to be analyzed. The wavelength of maximum source emission changes each time its temperature is changed, and hence a coarse wavelength scan is performed. The detector output is passed to a microprocessor which compares it with a theoretical gas having no emission or absorption bands at the wavelengths used, so as to compute the actual absorption by the gas and hence its composition. The invention is suitable for analysis of flue gases, and absorption bands of typical flue gases are given, Fig. 3 (not shown).
GB4030975A 1976-09-28 1976-09-28 Measuring gas concentrations Expired GB1505913A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4030975A GB1505913A (en) 1976-09-28 1976-09-28 Measuring gas concentrations

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4030975A GB1505913A (en) 1976-09-28 1976-09-28 Measuring gas concentrations

Publications (1)

Publication Number Publication Date
GB1505913A true GB1505913A (en) 1978-04-05

Family

ID=10414262

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4030975A Expired GB1505913A (en) 1976-09-28 1976-09-28 Measuring gas concentrations

Country Status (1)

Country Link
GB (1) GB1505913A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0625702A1 (en) * 1993-05-17 1994-11-23 The Foxboro Company Identification of unknown gases

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0625702A1 (en) * 1993-05-17 1994-11-23 The Foxboro Company Identification of unknown gases
US5448070A (en) * 1993-05-17 1995-09-05 The Foxboro Company Identification of unknown gases using infrared absorption spectroscopy
US5508525A (en) * 1993-05-17 1996-04-16 The Foxboro Company Identification of unknown gases using infrared absorption spectroscopy

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Legal Events

Date Code Title Description
PS Patent sealed
746 Register noted 'licences of right' (sect. 46/1977)
PCNP Patent ceased through non-payment of renewal fee