FR2624974B1 - GAS DETECTOR - Google Patents

GAS DETECTOR

Info

Publication number
FR2624974B1
FR2624974B1 FR8718130A FR8718130A FR2624974B1 FR 2624974 B1 FR2624974 B1 FR 2624974B1 FR 8718130 A FR8718130 A FR 8718130A FR 8718130 A FR8718130 A FR 8718130A FR 2624974 B1 FR2624974 B1 FR 2624974B1
Authority
FR
France
Prior art keywords
gas detector
detector
gas
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 - Lifetime
Application number
FR8718130A
Other languages
French (fr)
Other versions
FR2624974A1 (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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to FR8718130A priority Critical patent/FR2624974B1/en
Publication of FR2624974A1 publication Critical patent/FR2624974A1/en
Application granted granted Critical
Publication of FR2624974B1 publication Critical patent/FR2624974B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • G01N27/12—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body in dependence upon absorption of a fluid; of a solid body in dependence upon reaction with a fluid, for detecting components in the fluid
    • G01N27/122—Circuits particularly adapted therefor, e.g. linearising circuits
FR8718130A 1987-12-21 1987-12-21 GAS DETECTOR Expired - Lifetime FR2624974B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8718130A FR2624974B1 (en) 1987-12-21 1987-12-21 GAS DETECTOR

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8718130A FR2624974B1 (en) 1987-12-21 1987-12-21 GAS DETECTOR

Publications (2)

Publication Number Publication Date
FR2624974A1 FR2624974A1 (en) 1989-06-23
FR2624974B1 true FR2624974B1 (en) 1990-09-07

Family

ID=9358285

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8718130A Expired - Lifetime FR2624974B1 (en) 1987-12-21 1987-12-21 GAS DETECTOR

Country Status (1)

Country Link
FR (1) FR2624974B1 (en)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2131389A5 (en) * 1972-03-03 1972-11-10 Roux Michel Dinitrogen tetroxide detection and estimation - by increase in electrical resistance when gas passes through graphite powder
DE2408218C3 (en) * 1974-02-21 1983-11-03 Ehlen, Karl Josef, Dr., 5000 Köln Circuit arrangement for the detection of gases
FR2284881A1 (en) * 1974-09-11 1976-04-09 Westfaelische Berggewerkschaft Carbon monoxide detection using semiconductors - with temp variation giving long term stability and methane detection
US4112356A (en) * 1976-12-20 1978-09-05 Toy Stephen M Semiconductor gas detector circuit
JPS61151452A (en) * 1984-12-26 1986-07-10 Hitachi Ltd Gas detection apparatus

Also Published As

Publication number Publication date
FR2624974A1 (en) 1989-06-23

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Legal Events

Date Code Title Description
TP Transmission of property
ST Notification of lapse