FR2475733B1 - - Google Patents
Info
- Publication number
- FR2475733B1 FR2475733B1 FR8002914A FR8002914A FR2475733B1 FR 2475733 B1 FR2475733 B1 FR 2475733B1 FR 8002914 A FR8002914 A FR 8002914A FR 8002914 A FR8002914 A FR 8002914A FR 2475733 B1 FR2475733 B1 FR 2475733B1
- 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
Links
Classifications
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- 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
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B17/00—Fire alarms; Alarms responsive to explosion
- G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
- G08B17/117—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means by using a detection device for specific gases, e.g. combustion products, produced by the fire
Landscapes
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- General Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Biochemistry (AREA)
- Electrochemistry (AREA)
- Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8002914A FR2475733A1 (fr) | 1980-02-11 | 1980-02-11 | Detecteur de la presence d'un gaz combustible, notamment de methane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8002914A FR2475733A1 (fr) | 1980-02-11 | 1980-02-11 | Detecteur de la presence d'un gaz combustible, notamment de methane |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2475733A1 FR2475733A1 (fr) | 1981-08-14 |
| FR2475733B1 true FR2475733B1 (show.php) | 1983-08-12 |
Family
ID=9238429
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR8002914A Granted FR2475733A1 (fr) | 1980-02-11 | 1980-02-11 | Detecteur de la presence d'un gaz combustible, notamment de methane |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2475733A1 (show.php) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3147465A (en) * | 1960-12-27 | 1964-09-01 | Mine Safety Appliances Co | Methane alarm and control system |
| US3209343A (en) * | 1961-12-11 | 1965-09-28 | Nat Lead Co | Multi-station gas detecting apparatus |
| BE688266A (show.php) * | 1966-10-14 | 1967-03-16 | ||
| GB1548308A (en) * | 1976-11-02 | 1979-07-11 | Redding R J | Analysis instruments |
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1980
- 1980-02-11 FR FR8002914A patent/FR2475733A1/fr active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| FR2475733A1 (fr) | 1981-08-14 |