GB1447488A - Gas detectors - Google Patents
Gas detectorsInfo
- Publication number
- GB1447488A GB1447488A GB3894672A GB3894672A GB1447488A GB 1447488 A GB1447488 A GB 1447488A GB 3894672 A GB3894672 A GB 3894672A GB 3894672 A GB3894672 A GB 3894672A GB 1447488 A GB1447488 A GB 1447488A
- Authority
- GB
- United Kingdom
- Prior art keywords
- gas detectors
- detectors
- 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
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
- G01N27/14—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
-
- 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
- G01N27/18—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 changes in the thermal conductivity of a surrounding material to be tested
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
- G01N33/0031—General constructional details of gas analysers, e.g. portable test equipment concerning the detector comprising two or more sensors, e.g. a sensor array
- G01N33/0032—General constructional details of gas analysers, e.g. portable test equipment concerning the detector comprising two or more sensors, e.g. a sensor array using two or more different physical functioning modes
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Electrochemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3894672A GB1447488A (en) | 1972-08-21 | 1972-08-21 | Gas detectors |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3894672A GB1447488A (en) | 1972-08-21 | 1972-08-21 | Gas detectors |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1447488A true GB1447488A (en) | 1976-08-25 |
Family
ID=10406671
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3894672A Expired GB1447488A (en) | 1972-08-21 | 1972-08-21 | Gas detectors |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1447488A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4173886A (en) * | 1978-06-27 | 1979-11-13 | British Gas Corporation | Gas detectors |
DE3329432A1 (en) * | 1983-08-12 | 1985-02-28 | Auergesellschaft Gmbh, 1000 Berlin | GAS DETECTOR |
EP0231073A2 (en) * | 1986-01-15 | 1987-08-05 | Gas Measurement Instruments Ltd. | Apparatus for detecting gaseous hydrocarbons |
EP0440906A1 (en) * | 1990-02-03 | 1991-08-14 | Auergesellschaft Gmbh | Circuit arrangement for a gas sensor |
WO1993007477A1 (en) * | 1991-09-30 | 1993-04-15 | Siemens Aktiengesellschaft | Exhaust gas sensor using planar technology to regulate motor vehicle engines |
US6431016B1 (en) * | 1997-07-05 | 2002-08-13 | Osmetech Plc | Apparatus and methods for gas sampling |
-
1972
- 1972-08-21 GB GB3894672A patent/GB1447488A/en not_active Expired
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4173886A (en) * | 1978-06-27 | 1979-11-13 | British Gas Corporation | Gas detectors |
DE3329432A1 (en) * | 1983-08-12 | 1985-02-28 | Auergesellschaft Gmbh, 1000 Berlin | GAS DETECTOR |
EP0231073A2 (en) * | 1986-01-15 | 1987-08-05 | Gas Measurement Instruments Ltd. | Apparatus for detecting gaseous hydrocarbons |
EP0231073A3 (en) * | 1986-01-15 | 1989-08-30 | Gas Measurement Instruments Ltd. | Apparatus for detecting gaseous hydrocarbons |
EP0440906A1 (en) * | 1990-02-03 | 1991-08-14 | Auergesellschaft Gmbh | Circuit arrangement for a gas sensor |
WO1993007477A1 (en) * | 1991-09-30 | 1993-04-15 | Siemens Aktiengesellschaft | Exhaust gas sensor using planar technology to regulate motor vehicle engines |
US6431016B1 (en) * | 1997-07-05 | 2002-08-13 | Osmetech Plc | Apparatus and methods for gas sampling |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
414F | Notice of opposition given (sect. 14/1949) | ||
414A | Case decided by the comptroller ** specification amended (sect. 14/1949) | ||
SPA | Amended specification published | ||
PS | Patent sealed | ||
732 | Registration of transactions, instruments or events in the register (sect. 32/1977) | ||
PE20 | Patent expired after termination of 20 years |
Effective date: 19931120 |