FR2260796A1 - Measuring instrument for combustible gas concentrations in air - is unaffected by changes in gas mixture conductivity or ambient temp. - Google Patents
Measuring instrument for combustible gas concentrations in air - is unaffected by changes in gas mixture conductivity or ambient temp.Info
- Publication number
- FR2260796A1 FR2260796A1 FR7404435A FR7404435A FR2260796A1 FR 2260796 A1 FR2260796 A1 FR 2260796A1 FR 7404435 A FR7404435 A FR 7404435A FR 7404435 A FR7404435 A FR 7404435A FR 2260796 A1 FR2260796 A1 FR 2260796A1
- Authority
- FR
- France
- Prior art keywords
- measuring instrument
- unaffected
- changes
- air
- bridge
- 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.)
- Granted
Links
- 239000000203 mixture Substances 0.000 title 1
- 230000003197 catalytic effect Effects 0.000 abstract 1
- 238000009795 derivation Methods 0.000 abstract 1
- 238000005485 electric heating Methods 0.000 abstract 1
- 238000005259 measurement Methods 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
-
- 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
- G01N33/0062—General constructional details of gas analysers, e.g. portable test equipment concerning the measuring method or the display, e.g. intermittent measurement or digital display
- G01N33/0067—General constructional details of gas analysers, e.g. portable test equipment concerning the measuring method or the display, e.g. intermittent measurement or digital display by measuring the rate of variation of the concentration
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- General Health & Medical Sciences (AREA)
- Pathology (AREA)
- Immunology (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Biochemistry (AREA)
- General Physics & Mathematics (AREA)
- Combustion & Propulsion (AREA)
- Medicinal Chemistry (AREA)
- Food Science & Technology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
Gas concentration is measured by burning at a catalytic electrically heated element connected in a measuring bridge. The bridge is connected to a derivation device which is connected in turn through an integrating device to a measuring instrument, e.g. a voltmeter. The integrating device is connected to a time control circuit which is also connected to the bridge. Two identical electric heating elements are used, one for making the measurement, and the other as a comparison, and the other two arms of the bridge comprise resistors.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19742404014 DE2404014A1 (en) | 1974-01-29 | 1974-01-29 | ARRANGEMENT FOR MEASURING THE CONCENTRATION OF COMBUSTION GASES IN THE AIR BY CATALYTIC BURNING |
CH122174A CH566002A5 (en) | 1974-01-29 | 1974-01-29 | |
FR7404435A FR2260796A1 (en) | 1974-01-29 | 1974-02-11 | Measuring instrument for combustible gas concentrations in air - is unaffected by changes in gas mixture conductivity or ambient temp. |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19742404014 DE2404014A1 (en) | 1974-01-29 | 1974-01-29 | ARRANGEMENT FOR MEASURING THE CONCENTRATION OF COMBUSTION GASES IN THE AIR BY CATALYTIC BURNING |
CH122174A CH566002A5 (en) | 1974-01-29 | 1974-01-29 | |
FR7404435A FR2260796A1 (en) | 1974-01-29 | 1974-02-11 | Measuring instrument for combustible gas concentrations in air - is unaffected by changes in gas mixture conductivity or ambient temp. |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2260796A1 true FR2260796A1 (en) | 1975-09-05 |
FR2260796B1 FR2260796B1 (en) | 1977-06-10 |
Family
ID=27172801
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7404435A Granted FR2260796A1 (en) | 1974-01-29 | 1974-02-11 | Measuring instrument for combustible gas concentrations in air - is unaffected by changes in gas mixture conductivity or ambient temp. |
Country Status (3)
Country | Link |
---|---|
CH (1) | CH566002A5 (en) |
DE (1) | DE2404014A1 (en) |
FR (1) | FR2260796A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2356135A1 (en) * | 1976-06-22 | 1978-01-20 | Auergesellschaft Gmbh | MOUNTING FOR THE MEASURING BRIDGE OF A GAS DETECTOR |
FR2424817A1 (en) * | 1978-05-03 | 1979-11-30 | Bobst Sa | DEVICE FOR ADJUSTING THE MINIMUM CONCENTRATION OF SOLVENT VAPOR IN A GAS GIVEN BY PRINTING INK |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB0507895D0 (en) * | 2005-04-19 | 2005-05-25 | City Tech | Gas sensor assembly |
-
1974
- 1974-01-29 CH CH122174A patent/CH566002A5/xx not_active IP Right Cessation
- 1974-01-29 DE DE19742404014 patent/DE2404014A1/en active Pending
- 1974-02-11 FR FR7404435A patent/FR2260796A1/en active Granted
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2356135A1 (en) * | 1976-06-22 | 1978-01-20 | Auergesellschaft Gmbh | MOUNTING FOR THE MEASURING BRIDGE OF A GAS DETECTOR |
FR2424817A1 (en) * | 1978-05-03 | 1979-11-30 | Bobst Sa | DEVICE FOR ADJUSTING THE MINIMUM CONCENTRATION OF SOLVENT VAPOR IN A GAS GIVEN BY PRINTING INK |
Also Published As
Publication number | Publication date |
---|---|
CH566002A5 (en) | 1975-08-29 |
FR2260796B1 (en) | 1977-06-10 |
DE2404014A1 (en) | 1975-08-07 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB1023231A (en) | Improvements in and relating to gas detecting devices | |
ATE117083T1 (en) | METHOD AND DEVICE FOR MEASURING THE THERMAL CONDUCTIVITY OF GASES. | |
US2596992A (en) | Apparatus for gas analysis | |
FR2260796A1 (en) | Measuring instrument for combustible gas concentrations in air - is unaffected by changes in gas mixture conductivity or ambient temp. | |
FR2305720A1 (en) | Measuring and recording cutaneous temperature - involves using probe containing thermal resistors for measurement and controlling probe body temperature | |
US3497323A (en) | Apparatus for measuring the concentration of combustible gases and vapors | |
ATE120859T1 (en) | METHOD AND DEVICE FOR MEASURING THE CONCENTRATION OF A PARAMAGNETIC GAS. | |
ATE82801T1 (en) | DEVICE FOR DETECTING GASEOUS HYDROCARBONS. | |
US3370457A (en) | Gas detector | |
US3187559A (en) | Combustion gas analyzer | |
SU146908A1 (en) | The method of controlling the concentration of inhaled drugs during inhalation anesthesia | |
SU579569A1 (en) | Gas detector | |
Pritchard | A modified" thermal conductivity" gas analyser for measuring methane in air or carbon dioxide | |
SU991186A1 (en) | Device for measuring temperature | |
SU700829A1 (en) | Thermoelectric device for inspection of metals and alloys | |
GB971507A (en) | Improvements in or relating to electrical measuring apparatus | |
GB687427A (en) | An improved instrument for measuring temperature, air velocities, rate of cooling and the thermal conductivity of gases | |
SU924503A1 (en) | Device for measuring displacements | |
GB1320954A (en) | Selective combustion process for hydrogen-containing comustibles and apparatus therefor | |
GB1450776A (en) | Flammable gas detector | |
SU397829A1 (en) | METHOD OF SELECTIVE ANALYSIS | |
SU78131A1 (en) | Apparatus for determining the level of liquid and gas interface | |
SU763759A1 (en) | Device for measuring concentration of explosion hazardous components of gaseous mixture | |
SU744300A1 (en) | Apparatus for monitoring explosion-hazard of gas medium | |
JPS51130296A (en) | Gas concentration meter |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |