FR2432169A1 - Radiation absorption type gas analyser with protective casing - in which pressure is balanced with that of ambient atmos. - Google Patents

Radiation absorption type gas analyser with protective casing - in which pressure is balanced with that of ambient atmos.

Info

Publication number
FR2432169A1
FR2432169A1 FR7821794A FR7821794A FR2432169A1 FR 2432169 A1 FR2432169 A1 FR 2432169A1 FR 7821794 A FR7821794 A FR 7821794A FR 7821794 A FR7821794 A FR 7821794A FR 2432169 A1 FR2432169 A1 FR 2432169A1
Authority
FR
France
Prior art keywords
casing
gas
atmos
pref
pressure
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.)
Granted
Application number
FR7821794A
Other languages
French (fr)
Other versions
FR2432169B1 (en
Inventor
Thylbert De Paepe
Jean-Pierre Merlet
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.)
SEREG
Original Assignee
SEREG
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 SEREG filed Critical SEREG
Priority to FR7821794A priority Critical patent/FR2432169A1/en
Publication of FR2432169A1 publication Critical patent/FR2432169A1/en
Application granted granted Critical
Publication of FR2432169B1 publication Critical patent/FR2432169B1/fr
Granted 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
    • G01N21/37—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light using pneumatic detection

Abstract

The analyser comprises a cell contg. gas for analysis positioned between a source of radiation and a radiation detector. So far as possible the entire apparatus is enclosed in a casing which offers physical protection and prevents intrusion of gas from the surrounding atmos. into the measuring channel. The casing has to have openings for service pipework, ducts, cables etc., and these are made reasonably leakproof without incurring the expense of gas-tight seals. A system is provided to balance the pressure inside the casing with ambient pressure of the atmos.. The system pref. includes making part of the casing wall in a sheet material which is flexible, slightly resilient and impregnable to gas. This part of the casing wall is pref. a rubber bag with a pipe connection into the casing interior. The pipe pref. contains a filter material such as a powdered mixt. of magnesium perchlorate and ascarite. Used for analysing partic. CO or CO2. The analyser can be used in different ambient atmos. pressures without requiring frequent recalibration to eliminate errors due to intrusion of gases from outside the casing.
FR7821794A 1978-07-24 1978-07-24 Radiation absorption type gas analyser with protective casing - in which pressure is balanced with that of ambient atmos. Granted FR2432169A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7821794A FR2432169A1 (en) 1978-07-24 1978-07-24 Radiation absorption type gas analyser with protective casing - in which pressure is balanced with that of ambient atmos.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7821794A FR2432169A1 (en) 1978-07-24 1978-07-24 Radiation absorption type gas analyser with protective casing - in which pressure is balanced with that of ambient atmos.

Publications (2)

Publication Number Publication Date
FR2432169A1 true FR2432169A1 (en) 1980-02-22
FR2432169B1 FR2432169B1 (en) 1980-12-19

Family

ID=9211061

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7821794A Granted FR2432169A1 (en) 1978-07-24 1978-07-24 Radiation absorption type gas analyser with protective casing - in which pressure is balanced with that of ambient atmos.

Country Status (1)

Country Link
FR (1) FR2432169A1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3454760A (en) * 1965-09-01 1969-07-08 Hartmann & Braun Ag Adjustable support and alinement means for a multibeam infrared gas analyser
DE2016682A1 (en) * 1970-04-08 1971-11-04 Hartmann & Braun Ag Compensation of pressure- and temperature-dependent changes in the measurement gas concentration in ultrared gas analyzers
DE2702978A1 (en) * 1976-01-26 1977-08-04 Fuji Electric Co Ltd Compensator for pneumatic interferences - is for IR gas analysers and consists of two gas filled chambers

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3454760A (en) * 1965-09-01 1969-07-08 Hartmann & Braun Ag Adjustable support and alinement means for a multibeam infrared gas analyser
DE2016682A1 (en) * 1970-04-08 1971-11-04 Hartmann & Braun Ag Compensation of pressure- and temperature-dependent changes in the measurement gas concentration in ultrared gas analyzers
DE2702978A1 (en) * 1976-01-26 1977-08-04 Fuji Electric Co Ltd Compensator for pneumatic interferences - is for IR gas analysers and consists of two gas filled chambers

Also Published As

Publication number Publication date
FR2432169B1 (en) 1980-12-19

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Legal Events

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