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NO904884L - CATALYTIC INACTIVE GAS DETECTOR ELEMENT AND PROCEDURE FOR PRODUCING THEREOF. - Google Patents

CATALYTIC INACTIVE GAS DETECTOR ELEMENT AND PROCEDURE FOR PRODUCING THEREOF.

Info

Publication number
NO904884L
NO904884L NO90904884A NO904884A NO904884L NO 904884 L NO904884 L NO 904884L NO 90904884 A NO90904884 A NO 90904884A NO 904884 A NO904884 A NO 904884A NO 904884 L NO904884 L NO 904884L
Authority
NO
Norway
Prior art keywords
ceramic bead
procedure
producing
bead
catalytically inactive
Prior art date
Application number
NO90904884A
Other languages
Norwegian (no)
Other versions
NO904884D0 (en
Inventor
Fatma Bodur
Dieter Maehl
Original Assignee
Auergesellschaft Gmbh
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 Auergesellschaft Gmbh filed Critical Auergesellschaft Gmbh
Publication of NO904884D0 publication Critical patent/NO904884D0/en
Publication of NO904884L publication Critical patent/NO904884L/en

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
    • G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
    • G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
    • G01N27/14—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of an electrically-heated body in dependence upon change of temperature
    • G01N27/16—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of an electrically-heated body in dependence upon change of temperature caused by burning or catalytic oxidation of surrounding material to be tested, e.g. of gas
    • 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
    • G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
    • G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
    • G01N27/14—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of an electrically-heated body in dependence upon change of temperature

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 Electric Means (AREA)
  • Catalysts (AREA)

Abstract

The invention describes a catalytically inactive gas sensor (1) for gas measuring instruments comprising a ceramic bead (3) enclosing a heating coil (2) and a catalytically inactive coating which completely encloses the bead. It is necessary to ensure that such a gas sensor cannot become catalytically active in any application. The invention solves this problem because the ceramic bead (3) consists of a suspension containing up to 75 % of a metal oxide, the remainder being a mineral acid additive, and of a catalytically inactive glass coating (4) which is applied to the ceramic bead and whose linear thermal coefficient of expansion is matched to that of the ceramic bead (3). <IMAGE>
NO90904884A 1990-02-19 1990-11-09 CATALYTIC INACTIVE GAS DETECTOR ELEMENT AND PROCEDURE FOR PRODUCING THEREOF. NO904884L (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE4004977A DE4004977C2 (en) 1990-02-19 1990-02-19 Catalytically inactive gas detection element and method for its production

Publications (2)

Publication Number Publication Date
NO904884D0 NO904884D0 (en) 1990-11-09
NO904884L true NO904884L (en) 1991-08-20

Family

ID=6400375

Family Applications (1)

Application Number Title Priority Date Filing Date
NO90904884A NO904884L (en) 1990-02-19 1990-11-09 CATALYTIC INACTIVE GAS DETECTOR ELEMENT AND PROCEDURE FOR PRODUCING THEREOF.

Country Status (4)

Country Link
EP (1) EP0443091B1 (en)
AT (1) ATE105633T1 (en)
DE (2) DE4004977C2 (en)
NO (1) NO904884L (en)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE881845C (en) * 1944-01-28 1953-07-02 Auergesellschaft Ag Heating wire system, especially for the purposes of gas analysis
DE1197251B (en) * 1958-02-18 1965-07-22 Nat Res Dev Catalytically inactive, heated detector element for gas analyzers
DE2740158A1 (en) * 1977-09-02 1979-03-15 Auergesellschaft Gmbh CATALYTICALLY INACTIVE GAS DETECTING ELEMENT AND METHOD FOR THE PRODUCTION THEREOF
US4313907A (en) * 1980-04-21 1982-02-02 National Mine Corporation Apparatus for the detection of a combustible gas
GB2096321B (en) * 1981-04-04 1984-05-31 English Electric Valve Co Ltd Combustible-gas detectors

Also Published As

Publication number Publication date
EP0443091B1 (en) 1994-05-11
DE4004977A1 (en) 1991-08-29
EP0443091A1 (en) 1991-08-28
DE4004977C2 (en) 1994-01-20
ATE105633T1 (en) 1994-05-15
DE59005685D1 (en) 1994-06-16
NO904884D0 (en) 1990-11-09

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