A lead-free galvanic oxygen sensor having an aqueous electrolyte and a bismuth anode is disclosed. The electrolyte contains a polyol in addition to water and a salt. Surprisingly, a sensor with such an electrolyte has an increased resistance to passivation. The suppressed passivation of the bismuth anode leads to a sensor lifespan, in some instances, of greater than 100 days. The polyol can be added in the amount of between 20% and 30%. The polyol can comprise D-sorbitol, meso-erythritol, or glycerol. In some instances, the polyol in the electrolyte can increase the time until a sudden rise in potential for the sensor, while maintaining a constant current on the bismuth anode, of greater than 14 minutes.
G01N 27/26 - Recherche ou analyse des matériaux par l'emploi de moyens électriques, électrochimiques ou magnétiques en recherchant des variables électrochimiquesRecherche ou analyse des matériaux par l'emploi de moyens électriques, électrochimiques ou magnétiques en utilisant l'électrolyse ou l'électrophorèse
G01N 27/404 - Cellules avec l'anode, la cathode et l'électrolyte de la cellule du même côté d'une membrane perméable qui les sépare du fluide de l'échantillon
G01N 27/30 - Électrodes, p. ex. électrodes pour testsDemi-cellules
2.
Gas sensors with structure to resist signal losses due to condensation
Embodiments of the disclosure relate to capillary controlled gas sensors comprising a top cap assembly, wherein the top cap assembly is operable to reduce the effects of condensation and pressure changes on the effectiveness of the gas sensor. The top cap assembly comprises a capillary controlled gas flow path, a bulk flow control assembly, and a raised boss surrounded by a moat.
There is provided a method for configuring a plurality of network devices of a wireless fire detection system comprising a configuration device, a gateway device wirelessly communicating with the configuration device, and the plurality of network devices wirelessly communicating with the gateway device and among them, the method comprising: determining, by the configuration device, configuration data of each one of the plurality of network devices for configuring each one of the plurality of network devices; transmitting, by the configuration device, the configuration data to the gateway device; and upon receiving the configuration data from the configuration device, distributing, by the gateway device, the configuration data to each one of the plurality of network devices according to predetermined time slots for transmitting the configuration data.
G08B 1/08 - Systèmes de signalisation caractérisés seulement par la forme de transmission du signal utilisant une transmission électrique
H04L 12/24 - Dispositions pour la maintenance ou la gestion
G08B 25/00 - Systèmes d'alarme dans lesquels l'emplacement du lieu où existe la condition déclenchant l'alarme est signalé à une station centrale, p. ex. systèmes télégraphiques d'incendie ou de police
G08B 17/10 - Déclenchement par la présence de fumée ou de gaz
G08C 15/06 - Dispositions caractérisées par l'utilisation du multiplexage pour la transmission de plusieurs signaux par une voie commune successivement, c.-à-d. utilisant la division de temps
H04L 29/08 - Procédure de commande de la transmission, p.ex. procédure de commande du niveau de la liaison
A gas sensor including a gas sensing electrode, a counter electrode disposed within a housing, and respective conductors that connect the gas sensing electrode to the counter electrode via a sensing circuit is disclosed. The housing includes a solid electrolyte in communication with the gas sensing electrode and counter electrode wherein the solid electrolyte further comprises one or more coatings or layers. The one or more coatings or layers have a lower water vapor transport rate than that of the electrolyte, such that, in use, water vapor transport between the electrolyte and atmosphere is reduced.
G01N 27/407 - Cellules et sondes avec des électrolytes solides pour la recherche ou l'analyse de gaz
G01N 27/404 - Cellules avec l'anode, la cathode et l'électrolyte de la cellule du même côté d'une membrane perméable qui les sépare du fluide de l'échantillon
7.
GAS SENSOR WITH SOLID ELECTROLYTE HAVING WATER VAPOR DIFFUSION BARRIER COATING
A gas sensor including a gas sensing electrode (2), a counter electrode (4) disposed within a housing, and respective conductors that connect the gas sensing electrode to the counter electrode via a sensing circuit is disclosed. The housing includes a solid electrolyte (5) in communication with the gas sensing electrode and counter electrode wherein the solid electrolyte further comprises one or more coatings or layers (6,15a). The one or more coatings or layers have a lower water vapor transport rate than that of the electrolyte, such that, in use, water vapor transport between the electrolyte and atmosphere is reduced.
A wireless communications system includes both a primary communications path, wherein a gateway can communicate with each member of a plurality of ambient condition detectors, and a secondary back-up path available in the event of a failure on part of the primary path. Required power for the network can be minimized by path selection.
H04L 12/28 - Réseaux de données à commutation caractérisés par la configuration des liaisons, p. ex. réseaux locaux [LAN Local Area Networks] ou réseaux étendus [WAN Wide Area Networks]
H04W 40/10 - Sélection d'itinéraire ou de voie de communication, p. ex. routage basé sur l'énergie disponible ou le chemin le plus court sur la base des ressources nodales sans fil sur la base de la puissance ou de l'énergie disponible
A gas sensor including a housing containing a potassium permanganate element sandwiched between two polytetrafluoroethylene elements, a carbon element, a polytetrafluoroethylene element located adjacent to the carbon element, a sensing electrode, a reference electrode, and a counter electrode with attached current collectors, and an electrolyte.
G01N 27/404 - Cellules avec l'anode, la cathode et l'électrolyte de la cellule du même côté d'une membrane perméable qui les sépare du fluide de l'échantillon
G01N 33/00 - Recherche ou analyse des matériaux par des méthodes spécifiques non couvertes par les groupes
An optical smoke detector includes a radiant energy source and a sensor. The source and the sensor are carried by an optical block that provides a fixed orientation therebetween and barriers therebetween. The barriers reduce noise and false alarming due to bugs, dust, water vapor, and other intrusive elements. The barriers can include V-shaped members at a selective angle relative to center lines of the source and the sensor.
G08B 17/10 - Déclenchement par la présence de fumée ou de gaz
G08B 17/107 - Déclenchement par la présence de fumée ou de gaz utilisant un dispositif émetteur et récepteur de lumière pour détecter une diffusion de lumière due à de la fumée
A system includes a two dimensional display device coupled to control circuitry. The control circuitry establishes a two dimensional representation of at least first and second floors of a building. Responsive to a selected input, closed boundaries are established that surround the two dimensional representations of each floor. Responsive to at least one other input, first and second coordinate systems are established with one coordinate system associated with each boundary. Three dimensional information can be established relative to the various devices installed on each floor, and simulations of operation can be carried out. An installer can move various ones of the devices and re-run the simulation to evaluate which configuration provides a better communication result.
Packaging for electronic components includes provisions to short selected electrodes of the components together. A plastic base portion with a plurality of component receiving cavities carries a flexible, carbonized shorting element which extends between cavities. The cavities include a recess which is adjacent to the shorting element. Components can be inserted into respective cavities, and some of the electrodes will contact the shorting element. Other electrodes will extend into the recess and not be shorted.
G01N 33/00 - Recherche ou analyse des matériaux par des méthodes spécifiques non couvertes par les groupes
G01N 35/00 - Analyse automatique non limitée à des procédés ou à des matériaux spécifiés dans un seul des groupes Manipulation de matériaux à cet effet
G01N 33/487 - Analyse physique de matériau biologique de matériau biologique liquide
14.
Redundant input pipe networks in aspirated smoke detectors
An aspirated detecting system includes a multi-channel aspirated smoke detector with each channel including an air moving element, such as a fan, first and second sets of substantially identical air flow pipes where each set defines a plurality of spaced apart inflow ports. Control circuits activate a first element and then a second element to establish a transport time associated with at least one inflow port in response to the detector sensing a predetermined smoke condition. The control circuits include a storage unit which includes pre-stored timer values which are associated with respective transport times from an associated inflow port.
H02B 1/00 - Charpentes, tableaux, panneaux, pupitres, enveloppesDétails de postes de transformation ou de dispositions de commutation
F21S 8/04 - Dispositifs d'éclairage destinés à des installations fixes destinés uniquement au montage sur un plafond ou sur une structure similaire en porte-à-faux
A62C 3/16 - Prévention, limitation ou extinction des incendies spécialement adaptées pour des objets ou des endroits particuliers dans les installations électriques, p. ex. chemins de câbles
G08B 17/10 - Déclenchement par la présence de fumée ou de gaz
G01N 1/26 - Dispositifs pour prélever des échantillons à l'état gazeux avec mesures prises pour l'aspiration à partir de plusieurs endroits
G08B 29/16 - Systèmes de signalisation ou d'alarme de sécurité, p. ex. systèmes redondants
A method and apparatus that including a control panel sending an activate output command, a gateway of the control panel receiving the activate output command and determining a time period until a wireless communication subsystem becomes available, the wireless subsystem adjusting the determined time period by determining a time until a node is available to receive the output command through the gateway and wireless subsystem, the wireless subsystem sending the output command and a value of the adjusted determined time period to the node and the node activating an output device based upon the output command and adjusted determined time period.
G08B 17/00 - Alarmes d'incendieAlarmes réagissant à une explosion
G08B 25/10 - Systèmes d'alarme dans lesquels l'emplacement du lieu où existe la condition déclenchant l'alarme est signalé à une station centrale, p. ex. systèmes télégraphiques d'incendie ou de police caractérisés par le moyen de transmission utilisant des systèmes de transmission sans fil
16.
Wireless fire system with idle mode and gateway redundancy
A method and apparatus that includes the steps of providing a plurality of wireless nodes including at least one parent node and at least one child node, a control panel sending instructions to and receiving data from the plurality of nodes through a primary gateway and a wireless subsystem of the gateway, the primary gateway synchronizing the plurality of nodes by periodically transmitting a synchronization signal and one of the plurality of nodes detecting failure of the gateway and transmitting an idle synchronization signal for so long as the one of the plurality of nodes detects failure of the gateway.
H04W 4/00 - Services spécialement adaptés aux réseaux de télécommunications sans filLeurs installations
H04L 29/08 - Procédure de commande de la transmission, p.ex. procédure de commande du niveau de la liaison
H04L 29/14 - Contre-mesures pour remédier à un défaut
G08B 25/00 - Systèmes d'alarme dans lesquels l'emplacement du lieu où existe la condition déclenchant l'alarme est signalé à une station centrale, p. ex. systèmes télégraphiques d'incendie ou de police
H04W 84/18 - Réseaux auto-organisés, p. ex. réseaux ad hoc ou réseaux de détection
H04L 12/28 - Réseaux de données à commutation caractérisés par la configuration des liaisons, p. ex. réseaux locaux [LAN Local Area Networks] ou réseaux étendus [WAN Wide Area Networks]
A device that includes a plurality of substantially identical batteries coupled via switching circuits to a power bus is provided. Control circuits can be coupled to the batteries and the switching circuits to provide electrical energy to the bus from each of the batteries during a sequence of predetermined time intervals, wherein one of the batteries provides electrical energy to the bus during a greater percentage of each time intervals than the others of the plurality. The remaining battery life of the others of the plurality can be estimated in response to sensing that the one of the batteries is substantially discharged.
G01R 31/36 - Dispositions pour le test, la mesure ou la surveillance de l’état électrique d’accumulateurs ou de batteries, p. ex. de la capacité ou de l’état de charge
G08B 29/18 - Prévention ou correction d'erreurs de fonctionnement
H01M 10/48 - Accumulateurs combinés à des dispositions pour mesurer, tester ou indiquer l'état des éléments, p. ex. le niveau ou la densité de l'électrolyte
H02J 7/00 - Circuits pour la charge ou la dépolarisation des batteries ou pour alimenter des charges par des batteries
18.
Support for electrode stack and provision for venting of a gas sensor using an internally mounted table
A sensor with a sensor housing or body, a plastic molded table positioned in the sensor housing; and a counter electrode carried on a first end of the table.
G01N 27/403 - Ensembles de cellules et d'électrodes
G01N 27/404 - Cellules avec l'anode, la cathode et l'électrolyte de la cellule du même côté d'une membrane perméable qui les sépare du fluide de l'échantillon
19.
Ultrasonic transducers in aspirating smoke detectors for transport time measurement
A method and apparatus of determining gas transport time from an input port to first and second ultrasonic detectors in a flow conduit for an aspirated smoke detector are provided. The method includes first measuring a transit time of ambient air between the detectors. Then, a different gas is injected into the conduit, and the time of injection is stored. The transit time is measured at least intermittently between the two ultrasonic detectors until a change therein is detected. A time of detected change is subtracted from the time of injection to establish a transport time for the aspirated smoke detector.
G08B 17/10 - Déclenchement par la présence de fumée ou de gaz
G08B 29/14 - Vérification des circuits de détection
G01N 15/00 - Recherche de caractéristiques de particulesRecherche de la perméabilité, du volume des pores ou de l'aire superficielle effective de matériaux poreux
G01N 11/00 - Recherche des propriétés d'écoulement des matériaux, p. ex. la viscosité, la plasticitéAnalyse des matériaux en déterminant les propriétés d'écoulement
09 - Appareils et instruments scientifiques et électriques
10 - Appareils et instruments médicaux
42 - Services scientifiques, technologiques et industriels, recherche et conception
Produits et services
Scientific, weighing, and measuring apparatus and instruments, namely, gas detectors and sensors for the detection of oxygen, combustible and toxic gases; gas detectors and sensors for detecting and analyzing automotive emissions; parts and fittings for all the aforesaid goods [ Surgical, medical, dental and veterinary apparatus and instruments, namely, sensors and monitors for detecting and measuring gases dispensed to patients for respiration or transpiration; sensors and monitors for detecting and measuring gases exhaled or transpired from patients; parts and fittings for all the aforesaid goods ] [ Scientific and technological services, namely, research, development and design of scientific, industrial safety, emissions, automotive and medical gas sensors, detectors and monitors; industrial analysis and research services in the field of scientific, industrial safety, emissions, automotive and medical gas sensors, detectors and monitors; development of new products for others ]
A lead-free, self-corrosion-free electrochemical galvanic oxygen sensor is provided. The preferred sensor includes a container, the container including a lead-free anode, an alkali electrolyte, a carbon platinized with platinum cathode and a nickel wire current collector, wherein the container further includes a diffusion barrier that causes the sensor to operate in the limiting current region.
G01N 27/413 - Cellules de concentration utilisant des électrolytes liquides
G01N 27/404 - Cellules avec l'anode, la cathode et l'électrolyte de la cellule du même côté d'une membrane perméable qui les sépare du fluide de l'échantillon
22.
Systems and methods of fast wireless output device activation in a mesh network system
Systems and methods of fast wireless output device activation in a mesh network system are provided. Methods can include a parent device receiving data from a child device, the parent device determining if the data received from the child device requires an output, and if so, the parent device activating an output device associated with the parent device. In some methods, the parent device need not wait for instructions from a control panel or gateway before activating the output device. Accordingly, the latency time to activate the output device can be reduced.
H04W 4/00 - Services spécialement adaptés aux réseaux de télécommunications sans filLeurs installations
H04Q 9/00 - Dispositions dans les systèmes de commande à distance ou de télémétrie pour appeler sélectivement une sous-station à partir d'une station principale, sous-station dans laquelle un appareil recherché est choisi pour appliquer un signal de commande ou pour obtenir des valeurs mesurées
23.
Systems and methods of fast power up for electrochemical sensors
Systems and methods of fast power up for electrochemical sensors are provided. A system can include an electrochemical sensor, and a potentiostat circuit, wherein, upon startup, the potentiostat circuit drives the electrochemical sensor to the electrochemical sensor's normal operating condition at a rate that is not limited by voltage and/or current supply. A method can include a potentiostat circuit driving an electrochemical sensor to the electrochemical sensor's normal operating condition at a rate that is not limited by voltage and/or current supply.
A gas sensor includes known types of electrodes such as sensing electrodes, counter electrodes or reference electrodes to sense the presence of a predetermined gas. In addition, at least one diagnostic electrode is carried in the sensor. The diagnostic electrode implements at least one diagnostic function without substantially impairing the gas sensing function. The diagnostic electrode is immersed in sensor electrolyte.
G01N 27/404 - Cellules avec l'anode, la cathode et l'électrolyte de la cellule du même côté d'une membrane perméable qui les sépare du fluide de l'échantillon
A lead-free, self-corrosion-free electrochemical galvanic oxygen sensor is provided. The preferred sensor includes a container, the container including a lead-free anode, an alkali electrolyte, a carbon platinized with platinum cathode and a nickel wire current collector, wherein the container further includes a diffusion barrier that causes the sensor to operate in the limiting current region.
G01N 27/404 - Cellules avec l'anode, la cathode et l'électrolyte de la cellule du même côté d'une membrane perméable qui les sépare du fluide de l'échantillon
A compensated gas detector incorporates first and second pellistors combined with first and second resistors and an intervening switch. Control circuits can close the switch for normal gas detection. The switch can be opened to carry out diagnostic measurements. A compensation coefficient can be established in order to compensate outs from the pellistors due to mechanical damage thereto.
G01N 27/04 - Recherche ou analyse des matériaux par l'emploi de moyens électriques, électrochimiques ou magnétiques en recherchant l'impédance en recherchant la résistance
An electrochemical oxygen sensor is provided. The electrochemical sensor includes a housing having first and second compartments, a sensing electrode disposed within the first compartment of the housing, a consumable anode disposed within the second compartment of the housing, a porous separator between the sensing electrode and consumable electrode that separates the first and second compartments and an electrolyte saturating the porous separator and consumable anode. A first aperture on a first end of the housing extends between an outside surface of the housing and first compartment that allows gas access to the sensing electrode. A venting system on a second, opposing end of the housing includes a second aperture extending between the outside surface of the housing and second compartment and has a predetermined permeability that controls pressure in the second compartment and loss of moisture from the sensor.
G01N 27/404 - Cellules avec l'anode, la cathode et l'électrolyte de la cellule du même côté d'une membrane perméable qui les sépare du fluide de l'échantillon
28.
Low water vapour transfer coating of thermoplastic moulded oxygen gas sensors
A gas sensor is disclosed. The gas sensor includes a gas sensing electrode and a counter electrode disposed within a housing, and respective conductors that connects the gas sensing electrode and the counter electrode to a sensing circuit. The housing includes walls defining a cavity containing electrolyte in fluid communication with the gas sensing electrode and counter electrode and wherein the walls further comprise one or more coatings or second layers superimposed on the walls. The one or more coatings or second layers have a lower water vapor transport rate than that of the walls, such that, in use, water vapor transport between the electrolyte and atmosphere through the walls of the housing is reduced.
A gas sensor includes a substrate having a low thermal conductivity. Localized heating can be produced using a serpentined heater carried by the substrate. The low thermal conductivity of the substrate substantially confines the generated heat to a region local to the heater thereby reducing required power to operate the sensor. Multiple sensing elements can be deposited onto the substrate adjacent to respective heaters and relatively close together because of the thermal isolation provided by the substrate. In one embodiment, the sensor can include the ceramic substrate, the heater, catalytic material overlying the heater with a gas impermeable layer overlying, at least in part the catalytic material.
G01N 27/16 - Recherche ou analyse des matériaux par l'emploi de moyens électriques, électrochimiques ou magnétiques en recherchant l'impédance en recherchant la résistance d'un corps chauffé électriquement dépendant de variations de température produite par l'oxydation par combustion ou catalyse d'un matériau de l'espace environnant à tester, p. ex. d'un gaz
30.
Environmental parameter responsive, aspirated fire detector
An aspirated smoke detector includes at least one ambient atmosphere inflow collection pipe with a plurality of inflow ports arranged along the pipe. The ports of the pipe are defined at least in part by temperature sensitive materials which alter the area of the respective inflow port in response to physical and/or chemical changes. As the temperature increases the area increases, thereby drawing more of the local ambient air and airborne particulate matter into the flow pipe, and then onto the smoke sensing chamber. This increased flow off-sets the dilution present due to other air in the respective pipe from other inflow ports which might not be near the developing fire condition.
d) analysing the rate of decay of the transient decay signal to determine whether the performance of at least one component of the electrochemical gas sensor is within acceptable limits.
An apparatus for operating an electrochemical gas sensor, adapted for connection to an electrochemical gas sensor via a sensing circuit for control thereof, can carry out the disclosed method(s).
G01F 1/64 - Mesure du débit volumétrique ou du débit massique d'un fluide ou d'un matériau solide fluent, dans laquelle le fluide passe à travers un compteur par un écoulement continu en utilisant des effets électriques ou magnétiques en mesurant des courants électriques passant à travers l’écoulement de fluideMesure du débit volumétrique ou du débit massique d'un fluide ou d'un matériau solide fluent, dans laquelle le fluide passe à travers un compteur par un écoulement continu en utilisant des effets électriques ou magnétiques en mesurant le potentiel électrique produit par l’écoulement de fluide, p. ex. par effet électrochimique, effet de contact ou effet de frottement
G01N 17/00 - Recherche de la résistance des matériaux aux intempéries, à la corrosion ou à la lumière
G01N 27/26 - Recherche ou analyse des matériaux par l'emploi de moyens électriques, électrochimiques ou magnétiques en recherchant des variables électrochimiquesRecherche ou analyse des matériaux par l'emploi de moyens électriques, électrochimiques ou magnétiques en utilisant l'électrolyse ou l'électrophorèse
32.
LIQUID ELECTROLYTE COMPOSITION AND ITS USE IN GAS SENSORS
A liquid electrolyte composition obtainable by combining a first component comprising bistrifluoromethanesulfonimide and/or an analogue thereof with a second component comprising a dialkyl sulfone, diaryl sulfone, alkyl aryl sulfone, alkyl acyl sulfone, boric acid, alkyl boronic acid, aryl boronic acid, dialkyl phosphite, trialkyl phosphite, dialkyl phosphate, trialkyl phosphate, alkylene carbonate, alkanoic lactone, preferably alkanoic γ-lactone an analogue of any of these, or mixtures thereof, wherein any of the alkyl, aryl of alkenyl groups may be substituted or unsubstituted. The liquid electrolyte is used in an electrochemical gas sensor.
G01N 27/26 - Recherche ou analyse des matériaux par l'emploi de moyens électriques, électrochimiques ou magnétiques en recherchant des variables électrochimiquesRecherche ou analyse des matériaux par l'emploi de moyens électriques, électrochimiques ou magnétiques en utilisant l'électrolyse ou l'électrophorèse
G01N 27/28 - Composants de cellules électrolytiques
33.
Instrument docking station with non-destructive sensor analysis capabilities
A docking station for use with gas sensors includes limited test and diagnostic circuitry directed to specific characteristics of selected detectors. Where a family of detectors is to be evaluated, a universal interface for that family can be included. A single port can be used for multiple different detectors irrespective of specific detector characteristics.
The present invention provides a colorimetric gas detector comprising a substrate bearing a material that can react with a gas in an atmosphere being monitored and wherein the reaction causes the material to change the radiation at which the material absorbs or radiates radiation (the color-change material). The material is located in at least one discrete area of the substrate. By providing the color change material in discrete areas, the amount of such material can be reduced and different types of color-change material can be included on a common substrate to detect two or more gases simultaneously.
An ambient condition monitoring system includes a plurality of detectors such as smoke detectors, gas detectors, or fire detectors. Each of the detectors has two sets of input/output ports. One port can communicate with a system control unit. The second port can communicate with a local wired network to which is coupled a plurality of output devices. The output devices can be activated by the respective detector using a modulated control signal.
An electrochemical gas detector includes a superhydrophobic, nanostructured gas porous electrode. The electrode exhibits a physically disrupted porous region. In an embodiment, electrode material can be deposited around a templating material which is removed before use. Such electrodes exhibit repeatable and reproducible characteristics.
A portable, relatively low power gas detector incorporates a single pellistor-type sensor for sensing an explosive gas of interest. Outputs from the sensor are corrected in accordance with ambient temperature and humidity and pre-stored correction factors based on characteristics exhibited by a plurality of similar sensors.
A multi-frequency photoelectric smoke detector includes a multi-frequency, source and an multi-frequency sensing array. The array can be part of a solid state camera which can be used to sense scattered multi-frequency light. Multiple wavelength signals, red, blue green for example, emitted by the camera can be analyzed to determine a degree of airborne particulate matter in a sensing region between the source and the array.
G01N 15/06 - Recherche de la concentration des suspensions de particules
G01N 21/00 - Recherche ou analyse des matériaux par l'utilisation de moyens optiques, c.-à-d. en utilisant des ondes submillimétriques, de la lumière infrarouge, visible ou ultraviolette
A gas sensor includes a gas responsive pellistor and associated information specific to that pellistor. The information can include environmental compensation information, such as temperature or humidity compensation information or other manufacturing information, and is stored in a computer readable medium. Such information can be used by local circuitry in compensating the sensor while making ambient gas level determinations.
G01N 27/16 - Recherche ou analyse des matériaux par l'emploi de moyens électriques, électrochimiques ou magnétiques en recherchant l'impédance en recherchant la résistance d'un corps chauffé électriquement dépendant de variations de température produite par l'oxydation par combustion ou catalyse d'un matériau de l'espace environnant à tester, p. ex. d'un gaz
An electrochemical gas sensor is disclosed which comprises a gas sensing electrode and a counter electrode disposed within a housing, the housing having an aperture for gas ingress, the gas sensing electrode and counter electrode being separated by a region containing electrolyte, and means for connecting the gas sensing electrode and the counter electrode to a sensing circuit. An electrolyte-absorbing element is disposed inboard of the aperture, between the housing and the gas sensing electrode, in order to absorb electrolyte passing through the gas sensing electrode whilst maintaining a gas path through the electrolyte-absorbing element.
An aspirated smoke detector includes a flow path and a generator of acoustic waves in the flow path. Airborne particulate matter in the flow path responds to the acoustic field by particle agglomeration; the resulting larger particles flow into a photoelectric-type smoke sensor. A sensed level of particles can be processed, or compared to one or more predetermined thresholds to establish presence of one or more predetermined conditions.
G01H 17/00 - Mesure des vibrations mécaniques ou des ondes ultrasonores, sonores ou infrasonores non prévue dans les autres groupes de la présente sous-classe
G01N 37/00 - Détails non couverts par les autres groupes de la présente sous-classe
G08B 17/10 - Déclenchement par la présence de fumée ou de gaz
The present invention provides a unique solution to the problems of both steady-state and transient signals produced by a variety of interfering stimuli, including humidity, which relies upon the inclusion in a gas sensing electrode in an electrochemical gas sensor of a catalyst material in addition to a first catalyst material reactive to the target gas, the additional, or second, catalyst material producing a response to an interfering stimulus which is of the opposite polarity to that generated by the first catalyst material.
A plurality of detectors can be evaluated to determine if more than one has been assigned the same address. Responsive thereto, such detectors could be identified for follow-up maintenance, or service.
A mounting apparatus usable with ambient condition detectors includes first and second mounting bases spaced apart axially along a common center line. Respective detectors can be coupled to the bases as required in a specific installation.
09 - Appareils et instruments scientifiques et électriques
10 - Appareils et instruments médicaux
42 - Services scientifiques, technologiques et industriels, recherche et conception
Produits et services
Scientific, weighing and measuring apparatus and instruments, namely gas detectors and sensors for the detection of oxygen, combustible and toxic gases; gas detectors and sensors for detecting and analyzing automotive emissions; parts and fittings for all the aforesaid goods Surgical, medical, dental and veterinary apparatus and instruments, namely, sensors and monitors for detecting and measuring gases dispensed to patients for respiration or transpiration; sensors and monitors for detecting and measuring gases exhaled or transpired from patients; parts and fittings for all the aforesaid goods Scientific and technological services, namely research, development and design of scientific, industrial safety, emissions, automotive and medical gas sensors, detectors and monitors; industrial analysis and research services in the field of scientific, industrial safety, emissions, automotive and medical gas sensors, detectors and monitors; development of new products for others
09 - Appareils et instruments scientifiques et électriques
10 - Appareils et instruments médicaux
42 - Services scientifiques, technologiques et industriels, recherche et conception
Produits et services
Scientific, weighing and measuring apparatus and instruments,namely gas detectors and sensors for the detection of oxygen, combustible and toxic gases; gas detectors and sensors for detecting and analyzing automotive emissions; parts and fittings for all the aforesaid goods Surgical, medical, dental and veterinary apparatus and instruments, namely, sensors and monitors for detecting and measuring gases dispensed to patients for respiration or transpiration; sensors and monitors for detecting and measuring gases exhaled or transpired from patients; parts and fittings for all the aforesaid goods Scientific and technological services, namely research, development and design of scientific, industrial safety, emissions, automotive and medical gas sensors, detectors and monitors; industrial analysis and research services in the field of scientific, industrial safety, emissions, automotive and medical gas sensors, detectors and monitors; development of new products for others
A method of improving performance of electrochemical gas sensors includes cycling potentials applied to one or more of the electrodes of the respective sensor(s) to improve performance of a different electrode. In a process for treating a reference electrode, potentials can be applied to working and, or counter electrodes so as to modify the environment in the vicinity of the reference electrode. An apparatus can carry out the method automatically.
