GB1122430A - Improvements in or relating to apparatus for detecting gases - Google Patents
Improvements in or relating to apparatus for detecting gasesInfo
- Publication number
- GB1122430A GB1122430A GB4152065A GB4152065A GB1122430A GB 1122430 A GB1122430 A GB 1122430A GB 4152065 A GB4152065 A GB 4152065A GB 4152065 A GB4152065 A GB 4152065A GB 1122430 A GB1122430 A GB 1122430A
- Authority
- GB
- United Kingdom
- Prior art keywords
- methane
- methanol
- temperature
- atmosphere
- thermocouples
- 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
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/20—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
- G01N25/22—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity on combustion or catalytic oxidation, e.g. of components of gas mixtures
- G01N25/28—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity on combustion or catalytic oxidation, e.g. of components of gas mixtures the rise in temperature of the gases resulting from combustion being measured directly
- G01N25/30—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity on combustion or catalytic oxidation, e.g. of components of gas mixtures the rise in temperature of the gases resulting from combustion being measured directly using electric temperature-responsive elements
- G01N25/32—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity on combustion or catalytic oxidation, e.g. of components of gas mixtures the rise in temperature of the gases resulting from combustion being measured directly using electric temperature-responsive elements using thermoelectric elements
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Chemical Kinetics & Catalysis (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 Using Thermal Means (AREA)
Abstract
1,122,430. Analysing gas mixtures electrically. MINISTER OF POWER. Dec. 16, 1966 [Sept.30, 1965], No.41520/65. Headings G1B and G1N. [Also in Division H1] Apparatus for measuring the methane concentration of an atmosphere comprises two thermocouples covered with catalysts which react differently on an oxygen-methanol reaction in the presence of methane, whereby the difference in temperature is indicative of the methane concentration. As shown (Fig. 1), a tank 10 carrying liquid methanol 11 is fitted with a wick 12 enabling methanol vapour to be carried by the external atmospheric gas, which enters the housing 1 by apertures 9 and leaves by apertures 8, up through a chimney 5 to two thermocouples 14, 15 coated with different catalytic materials, each of which causes the methanol vapour to react with the atmospheric oxygen to raise the temperature of the thermocouples. The catalyst on thermocouple 14 enables methane in the atmosphere to enhance the oxygen-methanol reaction and its temperature is raised still further: the catalyst or thermocouple 15 is such that a methane atmosphere restricts this reaction, and its temperature is lowered. Thus, a meter 13 indicating the difference in thermocouple outputs may be calibrated in terms of percentage methane content in the surrounding atmosphere. An alternative construction is described Fig.5 (not shown).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB4152065A GB1122430A (en) | 1965-09-30 | 1965-09-30 | Improvements in or relating to apparatus for detecting gases |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB4152065A GB1122430A (en) | 1965-09-30 | 1965-09-30 | Improvements in or relating to apparatus for detecting gases |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1122430A true GB1122430A (en) | 1968-08-07 |
Family
ID=10420066
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4152065A Expired GB1122430A (en) | 1965-09-30 | 1965-09-30 | Improvements in or relating to apparatus for detecting gases |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1122430A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2499322A (en) * | 2012-02-08 | 2013-08-14 | Draeger Safety Ag & Co Kgaa | Catalytic gas sensor |
CN114199929A (en) * | 2021-11-16 | 2022-03-18 | 南昌大学 | Siphon type fluid specific heat capacity measuring method |
-
1965
- 1965-09-30 GB GB4152065A patent/GB1122430A/en not_active Expired
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2499322A (en) * | 2012-02-08 | 2013-08-14 | Draeger Safety Ag & Co Kgaa | Catalytic gas sensor |
CN103245700A (en) * | 2012-02-08 | 2013-08-14 | 德拉格安全股份两合公司 | Gas sensor |
GB2499322B (en) * | 2012-02-08 | 2014-03-05 | Draeger Safety Ag & Co Kgaa | Gas sensor |
US9201032B2 (en) | 2012-02-08 | 2015-12-01 | Dräger Safety AG & Co. KGaA | Gas sensor |
CN103245700B (en) * | 2012-02-08 | 2016-05-11 | 德拉格安全股份两合公司 | Gas sensor |
CN114199929A (en) * | 2021-11-16 | 2022-03-18 | 南昌大学 | Siphon type fluid specific heat capacity measuring method |
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