NITROGEN OXIDE CONCENTRATION MEASUREMENT DEVICE
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United States of America Patent
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Issued Date -
Dec 26, 2013
app pub date -
Mar 5, 2012
filing date -
Mar 18, 2011
priority date (Note) -
Abandoned
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Abstract
A nitrogen oxide concentration measurement device comprises a zero scrubber disposed within a gas flow path, and a controller. The zero scrubber performs subjects exhaled air flowing through the gas flow path from a mouthpiece toward a chamber to a NO removal treatment in a first period, out of a first period and a second period. The controller acquires the concentration of NO contained in the exhaled air on the basis of the differential voltage value outputted in the second period, which uses as a reference the differential voltage value outputted in the first period.
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