GB1122430A - Improvements in or relating to apparatus for detecting gases - Google Patents

Improvements in or relating to apparatus for detecting gases

Info

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
Application number
GB4152065A
Inventor
Jack Graham Firth
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.)
MINI OF POWER
Original Assignee
MINI OF POWER
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 MINI OF POWER filed Critical MINI OF POWER
Priority to GB4152065A priority Critical patent/GB1122430A/en
Publication of GB1122430A publication Critical patent/GB1122430A/en
Expired legal-status Critical Current

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).
GB4152065A 1965-09-30 1965-09-30 Improvements in or relating to apparatus for detecting gases Expired GB1122430A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (6)

* Cited by examiner, † Cited by third party
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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