GB2233087B - Apparatus for monitoring a gas - Google Patents

Apparatus for monitoring a gas

Info

Publication number
GB2233087B
GB2233087B GB9011843A GB9011843A GB2233087B GB 2233087 B GB2233087 B GB 2233087B GB 9011843 A GB9011843 A GB 9011843A GB 9011843 A GB9011843 A GB 9011843A GB 2233087 B GB2233087 B GB 2233087B
Authority
GB
United Kingdom
Prior art keywords
monitoring
gas
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 - Fee Related
Application number
GB9011843A
Other versions
GB2233087A (en
GB9011843D0 (en
Inventor
John Philip Dakin
Mark Johnson
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.)
York Ltd
Original Assignee
York 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
Priority claimed from GB898912446A external-priority patent/GB8912446D0/en
Priority claimed from GB898916777A external-priority patent/GB8916777D0/en
Application filed by York Ltd filed Critical York Ltd
Publication of GB9011843D0 publication Critical patent/GB9011843D0/en
Publication of GB2233087A publication Critical patent/GB2233087A/en
Application granted granted Critical
Publication of GB2233087B publication Critical patent/GB2233087B/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • G01N21/1717—Systems in which incident light is modified in accordance with the properties of the material investigated with a modulation of one or more physical properties of the sample during the optical investigation, e.g. electro-reflectance
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/58—Radiation pyrometry, e.g. infrared or optical thermometry using absorption; using extinction effect
    • 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
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/28—Investigating the spectrum
    • G01J3/42—Absorption spectrometry; Double beam spectrometry; Flicker spectrometry; Reflection spectrometry
    • G01J3/433—Modulation spectrometry; Derivative spectrometry
    • G01J2003/4336—Modulation spectrometry; Derivative spectrometry by magnetic modulation, e.g. Zeeman effect

Landscapes

  • Physics & Mathematics (AREA)
  • General 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)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
GB9011843A 1989-05-31 1990-05-25 Apparatus for monitoring a gas Expired - Fee Related GB2233087B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB898912446A GB8912446D0 (en) 1989-05-31 1989-05-31 Apparatus for monitoring a gas
GB898916777A GB8916777D0 (en) 1989-07-21 1989-07-21 Apparatus for monitoring a gas

Publications (3)

Publication Number Publication Date
GB9011843D0 GB9011843D0 (en) 1990-07-18
GB2233087A GB2233087A (en) 1991-01-02
GB2233087B true GB2233087B (en) 1993-09-29

Family

ID=26295420

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9011843A Expired - Fee Related GB2233087B (en) 1989-05-31 1990-05-25 Apparatus for monitoring a gas

Country Status (1)

Country Link
GB (1) GB2233087B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2237630B (en) * 1989-11-01 1993-10-13 York Ltd Apparatus for sensing a gas
DE4235225C2 (en) * 1992-10-13 1994-11-10 Iris Gmbh Infrared & Intellige Sensor arrangement and method for monitoring the conversion rate of an exhaust gas catalytic converter
GB0221216D0 (en) * 2002-09-13 2002-10-23 Delphi Tech Inc Method of measuring exhaust flow constituents
DE102008064173B4 (en) * 2008-12-22 2011-06-01 Universität Rostock Method and device for determining the substance concentration in gaseous or fluid media by means of optical absorption spectroscopy with broadband light sources

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4096388A (en) * 1977-06-10 1978-06-20 Hewlett-Packard Company Measuring gaseous oxygen with U.V. absorption

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4096388A (en) * 1977-06-10 1978-06-20 Hewlett-Packard Company Measuring gaseous oxygen with U.V. absorption

Also Published As

Publication number Publication date
GB2233087A (en) 1991-01-02
GB9011843D0 (en) 1990-07-18

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19970525