FR2260796B1 - - Google Patents

Info

Publication number
FR2260796B1
FR2260796B1 FR7404435A FR7404435A FR2260796B1 FR 2260796 B1 FR2260796 B1 FR 2260796B1 FR 7404435 A FR7404435 A FR 7404435A FR 7404435 A FR7404435 A FR 7404435A FR 2260796 B1 FR2260796 B1 FR 2260796B1
Authority
FR
France
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
FR7404435A
Other languages
French (fr)
Other versions
FR2260796A1 (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.)
Vysoka Skola Chemicko Technologicka V Praze
Original Assignee
Vysoka Skola Chemicko Technologicka V Praze
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 to CH122174A priority Critical patent/CH566002A5/xx
Priority to DE19742404014 priority patent/DE2404014A1/en
Application filed by Vysoka Skola Chemicko Technologicka V Praze filed Critical Vysoka Skola Chemicko Technologicka V Praze
Priority to FR7404435A priority patent/FR2260796A1/en
Publication of FR2260796A1 publication Critical patent/FR2260796A1/en
Application granted granted Critical
Publication of FR2260796B1 publication Critical patent/FR2260796B1/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
    • G01N33/0062—General constructional details of gas analysers, e.g. portable test equipment concerning the measuring method, e.g. intermittent, or the display, e.g. digital
    • G01N33/0067—General constructional details of gas analysers, e.g. portable test equipment concerning the measuring method, e.g. intermittent, or the display, e.g. digital by measuring the rate of variation of the concentration
FR7404435A 1974-01-29 1974-02-11 Measuring instrument for combustible gas concentrations in air - is unaffected by changes in gas mixture conductivity or ambient temp. Granted FR2260796A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CH122174A CH566002A5 (en) 1974-01-29 1974-01-29
DE19742404014 DE2404014A1 (en) 1974-01-29 1974-01-29 ARRANGEMENT FOR MEASURING THE CONCENTRATION OF COMBUSTION GASES IN THE AIR BY CATALYTIC BURNING
FR7404435A FR2260796A1 (en) 1974-01-29 1974-02-11 Measuring instrument for combustible gas concentrations in air - is unaffected by changes in gas mixture conductivity or ambient temp.

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH122174A CH566002A5 (en) 1974-01-29 1974-01-29
DE19742404014 DE2404014A1 (en) 1974-01-29 1974-01-29 ARRANGEMENT FOR MEASURING THE CONCENTRATION OF COMBUSTION GASES IN THE AIR BY CATALYTIC BURNING
FR7404435A FR2260796A1 (en) 1974-01-29 1974-02-11 Measuring instrument for combustible gas concentrations in air - is unaffected by changes in gas mixture conductivity or ambient temp.

Publications (2)

Publication Number Publication Date
FR2260796A1 FR2260796A1 (en) 1975-09-05
FR2260796B1 true FR2260796B1 (en) 1977-06-10

Family

ID=27172801

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7404435A Granted FR2260796A1 (en) 1974-01-29 1974-02-11 Measuring instrument for combustible gas concentrations in air - is unaffected by changes in gas mixture conductivity or ambient temp.

Country Status (3)

Country Link
CH (1) CH566002A5 (en)
DE (1) DE2404014A1 (en)
FR (1) FR2260796A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2627916C3 (en) * 1976-06-22 1978-12-21 Auergesellschaft Gmbh, 1000 Berlin Circuit arrangement for a measuring bridge of a gas detector
US4150495A (en) * 1978-05-03 1979-04-24 Bobst-Champlain, Inc. LEL (lower explosive limit) control with automatic calibration capability
GB0507895D0 (en) * 2005-04-19 2005-05-25 City Tech Gas sensor assembly

Also Published As

Publication number Publication date
FR2260796A1 (en) 1975-09-05
DE2404014A1 (en) 1975-08-07
CH566002A5 (en) 1975-08-29

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Legal Events

Date Code Title Description
ST Notification of lapse