Abstract: A measurement system is disclosed that includes features for detecting the presence of nitric oxide from a gas sample, such as exhaled breath. The measurement system includes an assembly that introduces one or more reducing gases into a reactor-sensor assembly to help stabilize the sensor signal response and improve the performance of the assembly over time. Suitable reducing gases include hydrogen gas (H2), carbon dioxide (CO), benzaldehyde, bisphenol A, and other similar compounds. The reducing gas may be introduced directly from one or more surrounding gases or through tubing or inline piping. The reducing gas may be generated from the liquid or solid forms.

Abstract: A gas detection apparatus for detecting the concentration of a first gas component contained in a gas under measurement includes a gas conversion section for convening the first gas component to a second gas component, a gas detection section whose electrical characteristics change with a change in the concentration of the second gas component when the gas detection section is in an activated state, and a detection state setting section. During a detection period, the detection state setting section sets the state of gas detection by the gas detection section to a detection executed state in which the gas detection section can detect the second gas component. During periods which are not the detection period, the detection state setting section sets the state of gas detection by the gas detection section to a detection suspended state in which the gas detection section does not detect the second gas component.

Abstract: A gas sensor including a conversion section for converting NO contained in a gas under measurement to NO2, and a detection section for detecting NO2 concentration in the gas under measurement after having passed through the conversion section. The conversion section includes a substrate portion which defines a flow passage for the gas under measurement, and a porous catalyst layer disposed on a surface of the substrate portion which converts NO to NO2. The flow passage has a hollow space in which the catalyst layer is not present and through which the gas under measurement flows. The catalyst layer has a thickness of 4 to 300 ?m as measured between the substrate portion and an outermost surface of the catalyst layer, the outermost surface being exposed to the hollow space.

Abstract: A mixed-potential-type sensor for measuring the concentration of nitrogen oxide contained in a gas under measurement including a solid electrolyte layer having oxygen-ion conductivity, and a pair of porous electrodes formed thereon. One electrode is covered with a first layer containing tungsten oxide as a main component. The other electrode is covered with a gas impermeable second layer. The second layer is in contact with the other electrode without intervention of the tungsten oxide component. The solid electrolyte layer is porous and allows the gas under measurement to permeate from an externally exposed surface of the solid electrolyte layer to the other electrode. The concentration of the nitrogen oxide is detected from a potential difference developed between the electrodes.

Abstract: A breath sensor including a main body into which breath can be introduced, a conversion section for converting a gas component contained in the breath to a specific component, and a sensing section for detecting the specific component. The sensing section constitutes a first unit including an integrated detection element and a first heater. The conversion section constitutes a second unit including an integrated catalyst and a second heater. The first unit and the second unit are disposed inside the main body so as to be separated from each other with a gap therebetween, or are in contact with each other via a heat insulating member. The first unit and second unit are in communication with each other through a pipe that allows the breath to pass therethrough, and the pipe is partially bent.

Abstract: A measurement system is disclosed that includes features for detecting the presence of nitric oxide from a gas sample, such as exhaled breath. The measurement system includes an assembly that introduces one or more reducing gases into a reactor-sensor assembly to help stabilize the sensor signal response and improve the performance of the assembly over time. Suitable reducing gases include hydrogen gas (H2), carbon dioxide (CO), benzaldehyde, bisphenol A, and other similar compounds. The reducing gas may be introduced directly from one or more surrounding gases or through tubing or inline piping. The reducing gas may be generated from the liquid or solid forms.