GB1387412A - Combustible gas detectors - Google Patents
Combustible gas detectorsInfo
- Publication number
- GB1387412A GB1387412A GB3186271A GB3186271A GB1387412A GB 1387412 A GB1387412 A GB 1387412A GB 3186271 A GB3186271 A GB 3186271A GB 3186271 A GB3186271 A GB 3186271A GB 1387412 A GB1387412 A GB 1387412A
- Authority
- GB
- United Kingdom
- Prior art keywords
- filament
- combustible gas
- july
- surrounded
- oxidation
- 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
Links
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 abstract 3
- 239000007789 gas Substances 0.000 abstract 3
- 230000003647 oxidation Effects 0.000 abstract 2
- 238000007254 oxidation reaction Methods 0.000 abstract 2
- 239000011819 refractory material Substances 0.000 abstract 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract 1
- 239000003054 catalyst Substances 0.000 abstract 1
- 239000008240 homogeneous mixture Substances 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- PIBWKRNGBLPSSY-UHFFFAOYSA-L palladium(II) chloride Chemical compound Cl[Pd]Cl PIBWKRNGBLPSSY-UHFFFAOYSA-L 0.000 abstract 1
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 abstract 1
- CLSUSRZJUQMOHH-UHFFFAOYSA-L platinum dichloride Chemical compound Cl[Pt]Cl CLSUSRZJUQMOHH-UHFFFAOYSA-L 0.000 abstract 1
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
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)
Abstract
1387412 Detecting combustible gases electrically ENGLISH ELECTRIC VALVE CO Ltd 6 July 1972 [7 July 1971] 31862/71 Heading G1N A combustible gas detector comprises a heated platinum wire filament 2 surrounded by a homogeneous mixture 3 of refractory material e.g. alumina, and catalyst material, e.g. palladium chloride or platinum chloride. The resistance of the filament changes with the temperature change arising from the oxidation of the combustible gas passing over the filament. The element may be connected in a bridge circuit with a compensating element 6 comprising a similar filament 7 surrounded by a mixture 8 of refractory material and an oxidation suppressant such as potassium hydroxide. Potentiometer 10 is adjusted to give zero meter reading in a normal atmosphere before the detector is subjected to the test atmosphere. Since the compensation and detector elements may be of different colour and hence have different thermal emissivities leading change of bridge balance with different applied voltages, a compensating resistor may be connected across the element 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3186271A GB1387412A (en) | 1971-07-07 | 1971-07-07 | Combustible gas detectors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3186271A GB1387412A (en) | 1971-07-07 | 1971-07-07 | Combustible gas detectors |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1387412A true GB1387412A (en) | 1975-03-19 |
Family
ID=10329510
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3186271A Expired GB1387412A (en) | 1971-07-07 | 1971-07-07 | Combustible gas detectors |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1387412A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4072467A (en) * | 1976-06-18 | 1978-02-07 | English Electric Valve Co., Ltd. | Combustible gas detectors |
| US4123225A (en) * | 1976-07-06 | 1978-10-31 | English Electric Valve Company Limited | Combustible gas detectors |
| FR2489961A1 (en) * | 1980-09-05 | 1982-03-12 | Nat Res Dev | ELEMENT ASSOCIATING A CATALYTIC MATERIAL AND AN ELECTRIC RESISTANCE FOR THE DETECTION OF COMBUSTIBLE GASES |
| DE3122662A1 (en) * | 1980-06-11 | 1982-04-01 | Mine Safety Appliances Co. Ltd., Reading, Berkshire | Electrically heatable element and method of producing it |
| US4416911A (en) | 1980-01-02 | 1983-11-22 | International Gas Detectors Limited | Gas sensor elements and methods of manufacturing them |
| US4891629A (en) * | 1988-05-16 | 1990-01-02 | General Electric Company | Binary gas analyzer instrument and analysis method |
-
1971
- 1971-07-07 GB GB3186271A patent/GB1387412A/en not_active Expired
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4072467A (en) * | 1976-06-18 | 1978-02-07 | English Electric Valve Co., Ltd. | Combustible gas detectors |
| US4123225A (en) * | 1976-07-06 | 1978-10-31 | English Electric Valve Company Limited | Combustible gas detectors |
| US4416911A (en) | 1980-01-02 | 1983-11-22 | International Gas Detectors Limited | Gas sensor elements and methods of manufacturing them |
| DE3122662A1 (en) * | 1980-06-11 | 1982-04-01 | Mine Safety Appliances Co. Ltd., Reading, Berkshire | Electrically heatable element and method of producing it |
| FR2489961A1 (en) * | 1980-09-05 | 1982-03-12 | Nat Res Dev | ELEMENT ASSOCIATING A CATALYTIC MATERIAL AND AN ELECTRIC RESISTANCE FOR THE DETECTION OF COMBUSTIBLE GASES |
| US4457954A (en) * | 1980-09-05 | 1984-07-03 | National Research Development Corporation | Catalytic gas-sensitive elements |
| US4891629A (en) * | 1988-05-16 | 1990-01-02 | General Electric Company | Binary gas analyzer instrument and analysis method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PE20 | Patent expired after termination of 20 years |