GB1453938A - Monitoring of a gas stream - Google Patents

Monitoring of a gas stream

Info

Publication number
GB1453938A
GB1453938A GB5003673A GB5003673A GB1453938A GB 1453938 A GB1453938 A GB 1453938A GB 5003673 A GB5003673 A GB 5003673A GB 5003673 A GB5003673 A GB 5003673A GB 1453938 A GB1453938 A GB 1453938A
Authority
GB
United Kingdom
Prior art keywords
lamp
amplifier
transducer
photo
particulate matter
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
GB5003673A
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.)
Elsag Bailey Inc
Original Assignee
Bailey Meter Co
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 Bailey Meter Co filed Critical Bailey Meter Co
Publication of GB1453938A publication Critical patent/GB1453938A/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
    • G01N21/314—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry with comparison of measurements at specific and non-specific wavelengths

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)
  • Instruments For Viewing The Inside Of Hollow Bodies (AREA)

Abstract

1453938 A gas analyzer using differential absorption of radiation BAILEY METER CO 26 Oct 1973 [26 Oct 1972] 50036/73 Heading G1A A gas analyzer for determining the content of a gaseous constituent of a sample independently of particulate matter present comprises magnesium lamp, 10, and gallium lamp 12, emitting wavelengths having absorption coefficients which are different for said constituent and equal for the particulate matter, through a sample in duct 2 to photo-transducer 16 feeding logarithmic amplifier and then for each wavelength, storage means receiving on lines 34, 36 indications as to which of lamps, 10, 12, alternately energized by control means 32, is excited, and connected via a difference amplifier to an adding amplifier producing a signal corresponding to said constituent concentration. Pipe 4 has slots 6 within duct 2 and bears housing 8 with hollow-cathode lamps, 10 emitting 2852A and 12 emitting 2874A, beam-splitter 14 and photo-transducer 18, collimating lens 20 and filter 22 of bandwidth 300 A or less peaking at 2850 Œ 50A. Filter 24 is similar. Windows 25 are kept free of particulate matter by bleed air through ports 26. Photo-transducer 18 supplies signals to logarithmic amplifier 48 and separate storage registers, which receive control signals on lines 34, 36, and feeds via a difference amplifier, giving output In I b -ln I a , said adding amplifier, which has a calibration input and gives output to an indicator or recorder giving an indication representing the expression (In I am -ln I a -ln I bm + in Ib + In α/#) ¸ L(K a -K b ) or to a controller. I a and Ib are the intensities reaching lamp 16 from the magnesium and gallium lamps respectively, I am and I bm are the intensities reaching lamp 18 and α and # are proportionality constants dependent on the beam-splitter 14. The sample may be flowing or contained. This embodiment is for determining S02 concentration. Indium may be used for lamp 10 and tin and lead for lamp 12.
GB5003673A 1972-10-26 1973-10-26 Monitoring of a gas stream Expired GB1453938A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US30120972A 1972-10-26 1972-10-26

Publications (1)

Publication Number Publication Date
GB1453938A true GB1453938A (en) 1976-10-27

Family

ID=23162416

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5003673A Expired GB1453938A (en) 1972-10-26 1973-10-26 Monitoring of a gas stream

Country Status (6)

Country Link
JP (2) JPS4977689A (en)
CA (1) CA998852A (en)
DE (1) DE2340747A1 (en)
FR (1) FR2205194A5 (en)
GB (1) GB1453938A (en)
IT (1) IT997265B (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2905630A1 (en) * 1978-02-15 1979-08-16 Hitachi Ltd OPTICAL MEASURING DEVICE
DE2920489A1 (en) * 1978-06-02 1979-12-06 Asea Ab FIBER OPTICAL MEASURING DEVICE
DE3023211A1 (en) * 1979-06-28 1981-01-22 Ti Fords Ltd METHOD AND DEVICE FOR DETERMINING AN AQUEOUS LIQUID IN BOTTLES AND CONTAINERS
DE10044827A1 (en) * 2000-06-26 2002-01-10 Emmrich Claudia Method and device for the optical-spectroscopic measurement of substance concentrations in substances or substance mixtures
WO2003100392A1 (en) * 2002-05-24 2003-12-04 Linde Aktiengesellschaft Device and method for spectroscopically measuring a gas concentration by determining a single absorption line

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2066947B (en) * 1980-01-09 1984-06-20 Measurex Corp Gas measuring apparatus with adjustable path length and method for operation and standardization therefor
US4471220A (en) * 1981-12-21 1984-09-11 Exxon Research And Engineering Co. System for monitoring trace gaseous ammonia concentration in flue gases
SE8301488L (en) * 1983-03-18 1984-09-19 Boliden Ab Saturation and device for saturation of gases forming a fog
DE3615259A1 (en) * 1986-05-06 1987-11-12 Krieg Gunther Method and system for the continuous determination of the concentrations of molecular compounds in liquids and gases
JP2531278B2 (en) * 1989-10-18 1996-09-04 株式会社豊田自動織機製作所 Ozone concentration measuring device
DE19627007A1 (en) * 1996-07-05 1998-01-08 Abb Research Ltd System for determining concentration of gas in gas mixture containing liquid drops
DE102005049522B3 (en) * 2005-10-17 2007-06-06 Gasbeetle Gmbh Gas sensor arrangement

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2905630A1 (en) * 1978-02-15 1979-08-16 Hitachi Ltd OPTICAL MEASURING DEVICE
DE2920489A1 (en) * 1978-06-02 1979-12-06 Asea Ab FIBER OPTICAL MEASURING DEVICE
DE3023211A1 (en) * 1979-06-28 1981-01-22 Ti Fords Ltd METHOD AND DEVICE FOR DETERMINING AN AQUEOUS LIQUID IN BOTTLES AND CONTAINERS
DE10044827A1 (en) * 2000-06-26 2002-01-10 Emmrich Claudia Method and device for the optical-spectroscopic measurement of substance concentrations in substances or substance mixtures
DE10044827C2 (en) * 2000-06-26 2002-06-06 Emmrich Claudia Method and device for the optical-spectroscopic measurement of substance concentrations in substances or substance mixtures
WO2003100392A1 (en) * 2002-05-24 2003-12-04 Linde Aktiengesellschaft Device and method for spectroscopically measuring a gas concentration by determining a single absorption line

Also Published As

Publication number Publication date
DE2340747A1 (en) 1974-05-09
FR2205194A5 (en) 1974-05-24
JPS5417787U (en) 1979-02-05
JPS4977689A (en) 1974-07-26
IT997265B (en) 1975-12-30
CA998852A (en) 1976-10-26

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee