摘要:
An electronic device cover system that includes an electronic device cover engageable with an electronic device, a gas sensor coupled to the electronic device cover, and a control circuit communicatively coupled to the gas sensor and communicatively engageable with an electronic device. When the gas sensor detects a presence of a target gas, the control circuit receives a signal output by the gas sensor and outputs a signal receivable by an electronic device.
摘要:
A gas sensor for detecting one or more contaminants in a refrigerant includes a housing having disposed therein a membrane electrode assembly comprising a sensing electrode, a counter electrode, and a solid polymer electrolyte disposed between the sensing electrode and the counter electrode. The sensing electrode comprises nanoparticles of a first catalyst comprising noble metal. The counter electrode comprises nanoparticles of a second catalyst comprising noble metal. The sensing electrode in the sensor has been preconditioned by exposure under a positive voltage bias to a preconditioning gas comprising the contaminant(s) or their precursors or derivatives.
摘要:
Systems and apparatus are provided for maintaining an ultra low oxygen concentration in a shipping container for the purpose of preventing spoilage of perishable food products. The system and apparatus may contain a composition of a mixture of gases including one or more of nitrogen, carbon dioxide, and another inert gas, wherein the mixture of gases positively pressurizes the shipping container with an ultra low oxygen concentration. The system and apparatus may use one or more sensors to monitor the composition of the mixture of gases, and may use one or more controllers to release the compressed gases into the interior of the container. The controller may release the compressed gases at a variable rate of release sufficient to maintain the ultra low oxygen concentration and to ensure consistent concentrations of the mixture of gases with the container.
摘要:
The present invention includes an apparatus (10) and method for detecting nitrogen gas comprising: a conduit (12) for a gas sample (16); one or more hollow core photonic crystal fibers HC-PCF (20) having a proximal portion and a distal portion, wherein the proximal portion is in communication with the gas sample (16) in the conduit (12); a laser (14) positioned to strike the gas sample (16) in the conduit (12) and opposite the one or more hollow core photonic crystal fibers (20); and a Raman spectra detector (30) connected to the distal portion of the hollow core photonic crystal fibers (20), wherein a Raman spectra is generated when the laser (14) strikes the gas sample (16) that is detected by the Raman spectra detector (30).
摘要:
A gas sensor is described. The sensor comprises a sensitive layer of single crystalline SnO disks and circuitry for measuring electrical resistance of the layer is provided. A change in resistance in the layer indicates adsorption of a gas on the surface. The sensor is particularly adapted for detecting NO 2 with high sensitivity and selectivity.
摘要:
Die Erfindung bezieht sich auf einen Reaktionsträger (14), eine Messvorrichtung (12) und ein Messverfahren zur Messung einer Konzentration von gas- und/oder aerosolförmigen Komponenten eines Gasgemisches. Der Reaktionsträger (14) weist zumindest einen Strömungskanal (42) auf, der sich zwischen zwei Anschlusselementen (44) erstreckt, und der Strömungskanal (42) bildet eine Reaktionskammer (46), in welcher ein Reaktionsstoff (48) vorgesehen ist, welcher ausgebildet ist, um mit zumindest einer zu messenden Komponente des Gasgemisches oder einem Reaktionsprodukt der zu messenden Komponente eine optisch detektierbare Reaktion einzugehen. Ferner weist der Reaktionsträger (14) zumindest ein Temperaturmesselement (88) auf. Die Messvorrichtung (12) weist zumindest ein Temperaturmesselement (90) auf, welches eine Temperatur der Messvorrichtung (12) und/oder des Reaktionsträgers (14) erfasst, sowie eine Temperaturbestimmungseinheit (92), welche in Abhängigkeit von dem Messergebnis des zumindest einen Temperäturmesselements (90) eine Temperatur des Gasgemisches bestimmt. Das Messverfahren umfasst die Bestimmung einer Temperatur des geförderten Gasgemisches im Strömungskanal (42) und die Bestimmung einer Konzentration der zumindest einen Komponente in Abhängigkeit von einer optisch detektierbaren Reaktion und der bestimmten Temperatur des Gasgemischs.