Title:
GAS SENSOR AND CONCENTRATION MEASUREMENT METHOD BY MEANS OF GAS SENSOR
Document Type and Number:
WIPO Patent Application WO/2024/075397
Kind Code:
A1
Abstract:
In the present invention, a sensor element is provided with first to third vacant chambers successively communicating from a gas introduction port via different diffusion rate control sections. An adjustment pump cell pumps oxygen into the first vacant chamber so that an H/C component contained in a gas to be measured is oxidized. A first measurement pump cell pumps oxygen out of the second vacant chamber so that all of H2O and CO2 contained in the gas to be measured introduced from the first vacant chamber into the second vacant chamber are reduced. A second measurement pump cell pumps oxygen into the third vacant chamber to selectively oxidize H2 generated by the reduction, specifies a concentration of H2O from values of pump-in currents of the adjustment pump cell and the second measurement pump cell, and specifies a concentration of CO2 on the basis of the specified concentration of H2O, the value of the pump-in current of the adjustment pump cell, and the value of a pump-out current of the first measurement pump cell.
Inventors:
WATANABE YUSUKE (JP)
ICHIKAWA DAICHI (JP)
ICHIKAWA DAICHI (JP)
Application Number:
PCT/JP2023/029128
Publication Date:
April 11, 2024
Filing Date:
August 09, 2023
Export Citation:
Assignee:
NGK INSULATORS LTD (JP)
International Classes:
G01N27/416
Attorney, Agent or Firm:
YOSHITAKE Hidetoshi et al. (JP)
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