FR2373793A1 - DEVICE FOR UNQUIVOUSLY INDICATING THE PROPORTION OF COMBUSTIBLE CONSTITUENTS IN A GAS SAMPLE - Google Patents

DEVICE FOR UNQUIVOUSLY INDICATING THE PROPORTION OF COMBUSTIBLE CONSTITUENTS IN A GAS SAMPLE

Info

Publication number
FR2373793A1
FR2373793A1 FR7736459A FR7736459A FR2373793A1 FR 2373793 A1 FR2373793 A1 FR 2373793A1 FR 7736459 A FR7736459 A FR 7736459A FR 7736459 A FR7736459 A FR 7736459A FR 2373793 A1 FR2373793 A1 FR 2373793A1
Authority
FR
France
Prior art keywords
measuring
gas sample
combustible constituents
unquivously
proportion
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
FR7736459A
Other languages
French (fr)
Other versions
FR2373793B1 (en
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.)
Draegerwerk AG and Co KGaA
Original Assignee
Draegerwerk AG and Co KGaA
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 Draegerwerk AG and Co KGaA filed Critical Draegerwerk AG and Co KGaA
Publication of FR2373793A1 publication Critical patent/FR2373793A1/en
Application granted granted Critical
Publication of FR2373793B1 publication Critical patent/FR2373793B1/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
    • 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
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/0004—Gaseous mixtures, e.g. polluted air
    • G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
    • G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
    • G01N33/0031—General constructional details of gas analysers, e.g. portable test equipment concerning the detector comprising two or more sensors, e.g. a sensor array
    • G01N33/0032—General constructional details of gas analysers, e.g. portable test equipment concerning the detector comprising two or more sensors, e.g. a sensor array using two or more different physical functioning modes

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Pathology (AREA)
  • Immunology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Biochemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Combustion & Propulsion (AREA)
  • Medicinal Chemistry (AREA)
  • Food Science & Technology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)

Abstract

Ce dispositif est du type de ceux comportant une chambre de mesure il contenant l'échantillon de gaz, dans laquelle sont disposés l'un à la suite de l'autre un fil de résistance de mesure 1, dont l'échauffement provoque la combustion du constituant combustible de l'échantillon, et un fil de résistance moins échauffé 2, pour compenser la conductibilité thermique; fils dont le point de jonction constitue un des sommets d'un pont de Weatstone. Dans le dispositif selon l'invention, le signal de sortie du pont est envoyé, avec le signal de sortie d'un circuit de mesure de la teneur d'oxygène, comportant un capteur 6 placé dans la chambre de mesure, et un interrupteur à seuil réglable 10, à un amplificateur additionneur 4, à la sortie duquel est relié un appareil indicateur 5. La somme des deux signaux amplifiée, provoque une déviation totale de l'aiguille de l'appareil indicateur. L'invention supprime toute ambiguïté dans l'indication de la concentration en constituants combustibles.This device is of the type of those comprising a measuring chamber it containing the gas sample, in which are arranged one after the other a measuring resistance wire 1, the heating of which causes combustion of the gas. fuel component of the sample, and a less heated resistance wire 2, to compensate for thermal conductivity; son whose junction point constitutes one of the vertices of a Weatstone bridge. In the device according to the invention, the output signal of the bridge is sent, with the output signal of a circuit for measuring the oxygen content, comprising a sensor 6 placed in the measurement chamber, and a switch to adjustable threshold 10, to an adder amplifier 4, to the output of which is connected an indicator device 5. The sum of the two amplified signals causes a total deviation of the needle of the indicator device. The invention eliminates any ambiguity in the indication of the concentration of combustible constituents.

FR7736459A 1976-12-10 1977-11-25 DEVICE FOR UNQUIVOUSLY INDICATING THE PROPORTION OF COMBUSTIBLE CONSTITUENTS IN A GAS SAMPLE Granted FR2373793A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19762655954 DE2655954C3 (en) 1976-12-10 1976-12-10 Device for the clear display of the proportion of combustible components in a gas sample

Publications (2)

Publication Number Publication Date
FR2373793A1 true FR2373793A1 (en) 1978-07-07
FR2373793B1 FR2373793B1 (en) 1984-01-06

Family

ID=5995161

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7736459A Granted FR2373793A1 (en) 1976-12-10 1977-11-25 DEVICE FOR UNQUIVOUSLY INDICATING THE PROPORTION OF COMBUSTIBLE CONSTITUENTS IN A GAS SAMPLE

Country Status (4)

Country Link
BE (1) BE861685A (en)
DE (1) DE2655954C3 (en)
FR (1) FR2373793A1 (en)
GB (1) GB1575767A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2507779A1 (en) * 1981-06-15 1982-12-17 Charbonnages De France METHOD AND APPARATUS FOR MEDIUM-NEW EXPLOSIMETRY OF BREAKING DOUBTS
FR2511506A1 (en) * 1981-08-12 1983-02-18 Auergesellschaft Gmbh ASSEMBLY FOR AN APPARATUS FOR MEASURING AND DISPLAYING THE CONCENTRATION OF GASES AND COMBUSTIBLE VAPORS CONTAINED IN AIR

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK172281A (en) * 1981-04-15 1982-10-16 O Johannsen APPLIANCE FOR ANALYSIS OF COMBUSTION GAS
GB2105849B (en) * 1981-09-11 1985-05-15 Coal Ind Electrical gas analyser for sensing at least two gases
DE3622307A1 (en) * 1986-07-03 1988-01-14 Draegerwerk Ag MEASURING DEVICE FOR DETECTING THE CONTENT OF COMBUSTIBLE GASES IN AIR MIXTURES
GB2361997A (en) * 2000-05-04 2001-11-07 Bw Technologies Ltd Combustible gas detection

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2507779A1 (en) * 1981-06-15 1982-12-17 Charbonnages De France METHOD AND APPARATUS FOR MEDIUM-NEW EXPLOSIMETRY OF BREAKING DOUBTS
EP0068959A2 (en) * 1981-06-15 1983-01-05 CHARBONNAGES DE FRANCE, Etablissement public dit: Explosion measuring method and apparatus with means for reducing uncertainty
EP0068959A3 (en) * 1981-06-15 1985-10-23 CHARBONNAGES DE FRANCE, Etablissement public dit: Explosion measuring method and apparatus with means for reducing uncertainty
FR2511506A1 (en) * 1981-08-12 1983-02-18 Auergesellschaft Gmbh ASSEMBLY FOR AN APPARATUS FOR MEASURING AND DISPLAYING THE CONCENTRATION OF GASES AND COMBUSTIBLE VAPORS CONTAINED IN AIR

Also Published As

Publication number Publication date
DE2655954C3 (en) 1980-05-22
GB1575767A (en) 1980-09-24
BE861685A (en) 1978-03-31
FR2373793B1 (en) 1984-01-06
DE2655954A1 (en) 1978-06-22
DE2655954B2 (en) 1979-08-23

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Legal Events

Date Code Title Description
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