FR2819051A1 - Pollution detector, for fumes from domestic oil or gas boiler, comprises sampling tube in flue linked to light emitter and receiver - Google Patents
Pollution detector, for fumes from domestic oil or gas boiler, comprises sampling tube in flue linked to light emitter and receiver Download PDFInfo
- Publication number
- FR2819051A1 FR2819051A1 FR0100061A FR0100061A FR2819051A1 FR 2819051 A1 FR2819051 A1 FR 2819051A1 FR 0100061 A FR0100061 A FR 0100061A FR 0100061 A FR0100061 A FR 0100061A FR 2819051 A1 FR2819051 A1 FR 2819051A1
- Authority
- FR
- France
- Prior art keywords
- duct
- flue
- light beam
- corridor
- fumes
- 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
- 239000003517 fume Substances 0.000 title claims abstract description 15
- 238000005070 sampling Methods 0.000 title abstract 6
- 239000007789 gas Substances 0.000 title description 6
- 238000002485 combustion reaction Methods 0.000 claims abstract description 19
- 239000013307 optical fiber Substances 0.000 claims abstract description 9
- 238000010521 absorption reaction Methods 0.000 claims abstract description 8
- 239000000446 fuel Substances 0.000 claims abstract description 6
- 239000000779 smoke Substances 0.000 claims description 16
- 230000003287 optical effect Effects 0.000 claims description 7
- 238000009795 derivation Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 2
- 238000000605 extraction Methods 0.000 claims description 2
- 239000000523 sample Substances 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 230000007257 malfunction Effects 0.000 description 2
- 230000011664 signaling Effects 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N5/00—Systems for controlling combustion
- F23N5/003—Systems for controlling combustion using detectors sensitive to combustion gas properties
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/47—Scattering, i.e. diffuse reflection
- G01N21/49—Scattering, i.e. diffuse reflection within a body or fluid
- G01N21/53—Scattering, i.e. diffuse reflection within a body or fluid within a flowing fluid, e.g. smoke
- G01N21/534—Scattering, i.e. diffuse reflection within a body or fluid within a flowing fluid, e.g. smoke by measuring transmission alone, i.e. determining opacity
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2235/00—Valves, nozzles or pumps
- F23N2235/12—Fuel valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N5/00—Systems for controlling combustion
- F23N5/02—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
- F23N5/08—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using light-sensitive elements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N5/00—Systems for controlling combustion
- F23N5/24—Preventing development of abnormal or undesired conditions, i.e. safety arrangements
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3504—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing gases, e.g. multi-gas analysis
- G01N2021/3513—Open path with an instrumental source
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/47—Scattering, i.e. diffuse reflection
- G01N21/49—Scattering, i.e. diffuse reflection within a body or fluid
- G01N21/53—Scattering, i.e. diffuse reflection within a body or fluid within a flowing fluid, e.g. smoke
- G01N21/534—Scattering, i.e. diffuse reflection within a body or fluid within a flowing fluid, e.g. smoke by measuring transmission alone, i.e. determining opacity
- G01N2021/536—Measurement device mounted at stack
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/59—Transmissivity
- G01N21/61—Non-dispersive gas analysers
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Combustion & Propulsion (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 Analysing Materials By Optical Means (AREA)
Abstract
Description
<Desc/Clms Page number 1> <Desc / Clms Page number 1>
APPAREIL DE DETECTION DE LA COMBUSTION POLLUANTE POUR CHAUDIERE. POLLUTING COMBUSTION DETECTION APPARATUS FOR BOILER.
La présente invention à pour objet un appareil apte à signaler les mauvaises combustions dues à des mauvais réglages ou des mauvais fonctionnements des chaudières domestique afin de limiter les rejets polluants
Pour la mesure de la teneur en gaz polluants contenus dans les fumées, on connaît diverses sortes d'analyseurs de gaz qui sont aptes à analyser en continus les fumées produites. L'inconvénient de genre d'appareil est essentiellement leur coût qui les écarte du marché des chaudières domestiques. The present invention relates to an apparatus capable of signaling poor combustion due to improper settings or malfunctions of domestic boilers in order to limit polluting discharges
Various kinds of gas analyzers are known for measuring the content of polluting gases contained in the fumes which are capable of continuously analyzing the fumes produced. The disadvantage of this type of appliance is essentially their cost which keeps them out of the market for domestic boilers.
Hors il s'avère qu'une part notable de la pollution atmosphérique, essentiellement dans les zones urbaines, est le résultat de mauvais réglages ou de mauvais fonctionnement des chaudières domestiques au fioul ou au gaz. However, it turns out that a significant share of air pollution, mainly in urban areas, is the result of improper settings or malfunction of domestic oil or gas boilers.
La présente invention à pour objet de pallier l'inconvénient précédemment cité en mettant en oeuvre un dispositif pour chaudière individuelle, d'un faible coût, apte à signaler tous défauts de combustion, ce dispositif étant installé à demeure à la sortie de la chaudière dans le conduit d'évacuation des fumées. The object of the present invention is to overcome the above-mentioned drawback by using a device for an individual boiler, of low cost, capable of signaling any combustion faults, this device being permanently installed at the outlet of the boiler in the smoke exhaust duct.
À cet effet, l'appareil selon l'invention, pour la détection de la combustion polluante, pour notamment chaudières individuelles se caractérise essentiellement en ce qu'il comprend un couloir à échantillon associé au conduit d'évacuation des fumées et traversé par une partie des fumées, ainsi que par un faisceau lumineux orienté transversalement à la direction d'écoulement des fumées dans le couloir, ledit faisceau lumineux étant généré par une source d'émission distante du couloir et du conduit d'évacuation des fumées et ledit
faisceau lumineux, après avoir traversé le couloir étant reçu par un récepteur de rayon lumineux installé à distance du couloir, ledit appareil comportant de plus un moyen comparateur pour comparer l'énergie lumineuse émise par la source d'émission à l'énergie lumineuse reçue par le récepteur et un moyen indicateur pour indiquer la différence entre l'énergie émise et l'énergie reçue et donc l'énergie absorbée par les fumées, le taux d'absorption étant représentatif de la qualité de la combustion
Les défauts de combustion peuvent provenir d'un mauvais débit d'air ou de carburant (fioul ou gaz), un manque ou un excès d'air, ou une détérioration de toutes les parties du brûleur qui participent à la combustion. L'appareil selon To this end, the apparatus according to the invention, for the detection of polluting combustion, in particular for individual boilers, is essentially characterized in that it comprises a sample passage associated with the smoke evacuation duct and crossed by a part fumes, as well as by a light beam oriented transversely to the direction of flow of fumes in the corridor, said light beam being generated by an emission source distant from the corridor and the smoke evacuation duct and said
light beam, after having crossed the corridor being received by a light ray receiver installed at a distance from the corridor, said apparatus further comprising a comparator means for comparing the light energy emitted by the emission source with the light energy received by the receiver and an indicator means for indicating the difference between the energy emitted and the energy received and therefore the energy absorbed by the fumes, the absorption rate being representative of the quality of combustion
Combustion faults can result from poor air or fuel flow (oil or gas), lack or excess of air, or deterioration of all parts of the burner involved in combustion. The device according to
<Desc/Clms Page number 2> <Desc / Clms Page number 2>
l'invention en affichant en permanence la qualité de la combustion prévient l'utilisateur de tout défaut de combustion. En outre, selon une autre caractéristique de l'invention, est prévu un dispositif de mise en sécurité connecté électriquement à la vanne d'alimentation en carburant de la rampe de chauffe, ce dispositif de sécurité commande la vanne dans le sens de l'obturation lorsque le taux d'absorption est représentatif d'une mauvaise combustion. Ainsi est obtenue une mise en veille automatique de la chaudière en cas de mauvaise combustion.
the invention by permanently displaying the quality of combustion warns the user of any combustion defect. In addition, according to another characteristic of the invention, a safety device is provided which is electrically connected to the fuel supply valve of the heating rail, this safety device controls the valve in the direction of closure. when the absorption rate is representative of poor combustion. An automatic standby of the boiler is thus obtained in the event of poor combustion.
D'autres avantages et caractéristiques de l'invention apparaîtront à la lecture de la description d'une forme préférée de réalisation, en se référant aux dessins annexés en lesquels. Other advantages and characteristics of the invention will appear on reading the description of a preferred embodiment, with reference to the accompanying drawings in which.
- la figure 1 montre de manière schématique un appareil selon une première forme de réalisation, - la figure 2 montre de manière schématique un appareil selon une seconde forme de réalisation. - Figure 1 schematically shows an apparatus according to a first embodiment, - Figure 2 schematically shows an apparatus according to a second embodiment.
Tel que représenté, l'appareil selon l'invention, pour la détection de la combustion polluante pour notamment chaudières individuelles, est associé au conduit 1 d'évacuation des fumées d'une chaudière à gaz ou au fioul et comprend un couloir à échantillon 2 associé au conduit d'évacuation des fumées 1 et traversé par une partie des fumées, ainsi que par un faisceau lumineux. As shown, the apparatus according to the invention, for the detection of polluting combustion for in particular individual boilers, is associated with the duct 1 for discharging the fumes of a gas or oil-fired boiler and comprises a sample corridor 2 associated with the smoke evacuation duct 1 and traversed by part of the smoke, as well as by a light beam.
Le faisceau lumineux est généré par une source d'émission 3 distante du couloir 2 et du conduit d'évacuation des fumées 1 Après avoir traversé le couloir, le faisceau lumineux est reçu par un récepteur 4 de rayon lumineux installé à distance du couloir 2. appareil comportant de plus un moyen comparateur 5 pour comparer l'énergie lumineuse émise par la source d'émission 3 à l'énergie lumineuse reçue par le récepteur 4 et un moyen indicateur 6 pour indiquer la différence entre l'énergie émise et l'énergie reçue et donc l'énergie absorbée par les fumées, le taux d'absorption étant représentatif de la qualité de la combustion. The light beam is generated by an emission source 3 distant from the corridor 2 and the smoke evacuation duct 1 After having crossed the corridor, the light beam is received by a receiver 4 of light ray installed at a distance from the corridor 2. apparatus further comprising a comparator means 5 for comparing the light energy emitted by the emission source 3 with the light energy received by the receiver 4 and an indicator means 6 for indicating the difference between the emitted energy and the energy received and therefore the energy absorbed by the fumes, the absorption rate being representative of the quality of combustion.
Par ailleurs l'appareil comprend un dispositif de mise en sécurité 7 connecté électriquement à la vanne d'alimentation de la rampe de chauffe en carburant, ce dispositif de sécurité commande la vanne dans le sens de Furthermore, the device comprises a safety device 7 electrically connected to the fuel heating rail supply valve, this safety device controls the valve in the direction of
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l'obturation lorsque le taux d'absorption est représentatif d'une mauvaise combustion. obturation when the absorption rate is representative of poor combustion.
Selon la forme préférée de réalisation, la source d'émission 3, le récepteur 4, le moyen comparateur 5 et le moyen indicateur 6, sont logés dans un même boîtier. Toujours selon la forme de réalisation, le moyen indicateur 6 est constitué par une série de diodes électro-luminescentes, agencées en ligne, et formant une échelle de valeur. According to the preferred embodiment, the emission source 3, the receiver 4, the comparator means 5 and the indicator means 6, are housed in the same housing. Still according to the embodiment, the indicator means 6 is constituted by a series of light-emitting diodes, arranged in line, and forming a value scale.
Selon une première forme de réalisation, le couloir 2 s'étend longitudinalement dans un support diamétral 8 et est constitué par une lumière oblongue formée de manière traversante dans ledit support. According to a first embodiment, the passage 2 extends longitudinally in a diametrical support 8 and is constituted by an oblong opening formed through through in said support.
Ce support diamétral 8 peut être monté de manière amovible dans le conduit de fumées 1 et occuper une position diamétrale dans ce dernier, ou selon une variante d'exécution, être monté de manière amovible dans une dérivation du conduit de fumées et occuper toujours une position diamétrale dans ladite dérivation. This diametral support 8 can be removably mounted in the flue 1 and occupy a diametrical position in the latter, or according to an alternative embodiment, be removably mounted in a bypass of the flue and always occupy a position diametral in said derivation.
Le faisceau lumineux, dans le couloir 2, est orienté transversalement à la direction d'écoulement des fumées. À cet effet le support diamétral 8, dans l'axe longitudinal médian du couloir d'échantillons 2 est doté de deux perçages traversants, en regard l'un de l'autre, dans l'un desquels est introduite l'extrémité distale d'une fibre optique 9 en relation optique avec la source d'émission 3 et dans l'autre l'extrémité distale d'une seconde fibre optique 10 en relation optique avec le récepteur de rayon lumineux 4. The light beam in the corridor 2 is oriented transversely to the direction of flow of the fumes. For this purpose the diametral support 8, in the median longitudinal axis of the sample passage 2 is provided with two through holes, facing one another, in one of which is introduced the distal end of an optical fiber 9 in optical relation with the emission source 3 and in the other the distal end of a second optical fiber 10 in optical relation with the light beam receiver 4.
Cette disposition particulièrement simple permet de maintenir à distance du conduit d'évacuation des fumées ainsi que du corps de chauffe et plus généralement de toute source de chaleur, la source d'émission 3, le récepteur 4, le moyen comparateur 5 et le moyen indicateur 6. This particularly simple arrangement makes it possible to keep the emission source 3, the receiver 4, the comparator means 5 and the indicator means away from the smoke evacuation duct as well as from the heating body and more generally from any heat source. 6.
Selon une autre forme de réalisation, le couloir 2 d'échantillons est constitué par le volume interne d'un élément tubulaire 11 connecté en dérivation sur le conduit 2 de fumées, ledit élément tubulaire possédant une bouche d'entrée des fumées connectée de manière étanche à une ouverture radiale du conduit de fumées 1 et une bouche de sortie des fumées connectée de manière étanche à une seconde ouverture radiale du conduit des fumées. La bouche de sortie est de plus raccordée à un dispositif d'aspiration des fumées 12 monté According to another embodiment, the lane 2 of samples is constituted by the internal volume of a tubular element 11 connected in derivation on the flue pipe 2, said tubular element having a flue inlet mouth connected in leaktight manner to a radial opening of the smoke duct 1 and a smoke outlet mouth tightly connected to a second radial opening of the smoke duct. The outlet mouth is also connected to a smoke extraction device 12 mounted
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dans le conduit d'évacuation des fumées 1, ledit élément tubulaire est par ailleurs doté de deux perçages traversants, en regard l'un de l'autre, dans l'un desquels est introduite l'extrémité distale d'une fibre optique 9 en relation optique avec la source d'émission 3 et dans l'autre l'extrémité distale d'une seconde fibre optique 10 en relation optique avec le récepteur 4 de rayon lumineux.
in the smoke evacuation duct 1, said tubular element is moreover provided with two through holes, facing one another, into one of which is introduced the distal end of an optical fiber 9 in optical relationship with the emission source 3 and in the other the distal end of a second optical fiber 10 in optical relationship with the receiver 4 of light ray.
Préférentiellement, le dispositif d'aspiration est un dispositif à effet Venturi. Comme on peut le voir ce dispositif comprend un tube connecté radialement à la bouche de sortie de l'élément tubulaire 11, et orienté selon la direction d'écoulement des fumées dans le conduit 1. Ce tube comprend selon une de ses extrémités un évasement d'entrée et selon son autre extrémité un évasement de sortie. Preferably, the suction device is a Venturi effect device. As can be seen, this device comprises a tube connected radially to the outlet mouth of the tubular element 11, and oriented in the direction of flow of the fumes in the duct 1. This tube comprises, at one of its ends, a flaring d 'inlet and at its other end an outlet flare.
Préférentiellement le couloir est formé dans une partie rectiligne de l'élément tubulaire et le faisceau lumineux est longitudinal et central audit couloir. Preferably, the corridor is formed in a rectilinear part of the tubular element and the light beam is longitudinal and central to said corridor.
En variante, le faisceau lumineux sera transversal audit couloir La partie rectiligne sera prolongée par deux coudes par lesquels l'élément tubulaire 11 se raccorde au conduit de fumées 1. As a variant, the light beam will be transverse to said corridor. The rectilinear part will be extended by two elbows by which the tubular element 11 is connected to the flue pipe 1.
Toujours selon la forme préférée de réalisation, le faisceau lumineux sera constitué par des infrarouges et de la lumière visible.
Still according to the preferred embodiment, the light beam will consist of infrared and visible light.
Enfin sera prévue une sonde de mesure de la température des fumées. Finally, a probe for measuring the flue gas temperature will be provided.
Il va de soi que la présente invention peut recevoir toutes variantes d'exécution sans pour autant sortir du cadre du présent brevetIt goes without saying that the present invention can receive any variant without departing from the scope of this patent.
Claims (9)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0100061A FR2819051B1 (en) | 2001-01-04 | 2001-01-04 | POLLUTANT COMBUSTION DETECTION APPARATUS FOR BOILER |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0100061A FR2819051B1 (en) | 2001-01-04 | 2001-01-04 | POLLUTANT COMBUSTION DETECTION APPARATUS FOR BOILER |
Publications (2)
Publication Number | Publication Date |
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FR2819051A1 true FR2819051A1 (en) | 2002-07-05 |
FR2819051B1 FR2819051B1 (en) | 2003-07-04 |
Family
ID=8858506
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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FR0100061A Expired - Fee Related FR2819051B1 (en) | 2001-01-04 | 2001-01-04 | POLLUTANT COMBUSTION DETECTION APPARATUS FOR BOILER |
Country Status (1)
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FR (1) | FR2819051B1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2880688A1 (en) * | 2005-01-12 | 2006-07-14 | Zone Ind Sarl O | Combustion gas monitoring device for e.g. gas fired boiler, has detection unit to control gas passage from one chamber with infrared ray sensor to another chamber with electrochemical sensors if gas concentration does not cross preset value |
US20190219264A1 (en) * | 2018-01-17 | 2019-07-18 | William A. Guido | Exhaust detecting safety switch assembly |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4922714A (en) * | 1987-11-23 | 1990-05-08 | Robert Bosch Gmbh | Device for measuring the particle emissions of an internal combustion engine |
SU1704041A1 (en) * | 1989-11-20 | 1992-01-07 | Челябинский Политехнический Институт Им.Ленинского Комсомола | Device for measurement of smoke content in exhaust gases of internal combustion engines |
US6045352A (en) * | 1998-06-25 | 2000-04-04 | Nicholson; Leroy E. | Carbon monoxide automatic furnace shutdown system |
-
2001
- 2001-01-04 FR FR0100061A patent/FR2819051B1/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4922714A (en) * | 1987-11-23 | 1990-05-08 | Robert Bosch Gmbh | Device for measuring the particle emissions of an internal combustion engine |
SU1704041A1 (en) * | 1989-11-20 | 1992-01-07 | Челябинский Политехнический Институт Им.Ленинского Комсомола | Device for measurement of smoke content in exhaust gases of internal combustion engines |
US6045352A (en) * | 1998-06-25 | 2000-04-04 | Nicholson; Leroy E. | Carbon monoxide automatic furnace shutdown system |
Non-Patent Citations (1)
Title |
---|
ALLEN M G: "DIODE LASER ABSORPTION SENSORS FOR GAS-DYNAMIC AND COMBUSTION FLOWS", MEASUREMENT SCIENCE AND TECHNOLOGY, IOP PUBLISHING, BRISTOL, GB, vol. 9, no. 4, 1 April 1998 (1998-04-01), pages 545 - 562, XP000780563, ISSN: 0957-0233 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2880688A1 (en) * | 2005-01-12 | 2006-07-14 | Zone Ind Sarl O | Combustion gas monitoring device for e.g. gas fired boiler, has detection unit to control gas passage from one chamber with infrared ray sensor to another chamber with electrochemical sensors if gas concentration does not cross preset value |
US20190219264A1 (en) * | 2018-01-17 | 2019-07-18 | William A. Guido | Exhaust detecting safety switch assembly |
Also Published As
Publication number | Publication date |
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FR2819051B1 (en) | 2003-07-04 |
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