GB674044A - Improvements relating to devices for measuring the content of paramagnetic gas in a gaseous mixture - Google Patents

Improvements relating to devices for measuring the content of paramagnetic gas in a gaseous mixture

Info

Publication number
GB674044A
GB674044A GB18887/48A GB1888748A GB674044A GB 674044 A GB674044 A GB 674044A GB 18887/48 A GB18887/48 A GB 18887/48A GB 1888748 A GB1888748 A GB 1888748A GB 674044 A GB674044 A GB 674044A
Authority
GB
United Kingdom
Prior art keywords
chamber
gas
content
magnetic field
heating element
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
GB18887/48A
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.)
ROBERT DONALD RICHARDSON
Original Assignee
ROBERT DONALD RICHARDSON
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 ROBERT DONALD RICHARDSON filed Critical ROBERT DONALD RICHARDSON
Publication of GB674044A publication Critical patent/GB674044A/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
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
    • G01N27/74—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables of fluids

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)

Abstract

<PICT:0674044/III/1> <PICT:0674044/III/2> A device for measuring the content of a paramagnetic gas, such as oxygen or nitric oxide in a gaseous mixture, comprises a test cell having a gas passage and a pair of chambers connected therewith each chamber containing an elongated heating element, means being provided for producing a magnetic field around the whole length of one of the heating elements. In operation the paramagnetic gas is attracted towards the strongest part of the magnetic field, that is, towards the centrally placed heating element, thus becoming heated, losing its magnetic attraction, and being replaced by fresh gas. The temperature of the heating element, lowered by the increased gas circulation is compared electrically with that of the element in the comparison chamber, the cooling being proportional to the paramagnetic gas content. According to the preferred embodiment, magnetizable pole pieces 24, Fig. 2, extend the whole length of chamber 18 and, due to their shape form a constriction within the chamber surrounding the centrally placed heater 36. A magnet 28 is pivoted about an axis 32. A companion chamber 20 identical with chamber 18 except that no magnetic field is applied, is provided, the heating elements in the two cells forming adjacent arms of a Wheatstone bridge circuit.
GB18887/48A 1947-07-23 1948-07-14 Improvements relating to devices for measuring the content of paramagnetic gas in a gaseous mixture Expired GB674044A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US762903A US2658385A (en) 1947-07-23 1947-07-23 Gas measuring device

Publications (1)

Publication Number Publication Date
GB674044A true GB674044A (en) 1952-06-18

Family

ID=25066344

Family Applications (1)

Application Number Title Priority Date Filing Date
GB18887/48A Expired GB674044A (en) 1947-07-23 1948-07-14 Improvements relating to devices for measuring the content of paramagnetic gas in a gaseous mixture

Country Status (2)

Country Link
US (1) US2658385A (en)
GB (1) GB674044A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2951359A (en) * 1954-04-17 1960-09-06 Hartmann & Braun Ag Method for compensating the influence of the carrier-gas in magnetic gasanalysers
US3292421A (en) * 1965-04-23 1966-12-20 Mine Safety Appliances Co Paramagnetic gas analyzer
JP3951164B2 (en) * 2000-05-23 2007-08-01 横河電機株式会社 Magnetic oxygen meter

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1860544A (en) * 1930-07-26 1932-05-31 Charles Engelhard Inc Gas analysis apparatus
US2269850A (en) * 1939-11-21 1942-01-13 William O Hebler Gas analysis apparatus
DE712762C (en) * 1940-09-12 1941-10-24 Sieens & Halkse Akt Ges Oxygen meter based on the magnetic thermal conductivity measuring principle
DE724041C (en) * 1940-09-15 1942-08-17 Versuchsanstalt Fuer Luftfahrt Exhaust gas checker for internal combustion engines
DE3005252A1 (en) * 1980-02-13 1981-08-20 Hoechst Ag, 6000 Frankfurt PARTICULATE AGENT FOR PREVENTING THE COMBUSTIBILITY OF COMBUSTIBLE SUBSTANCES

Also Published As

Publication number Publication date
US2658385A (en) 1953-11-10

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