公开(公告)号：US20210088472A1

公开(公告)日：2021-03-25

申请号：US17110634

申请日：2020-12-03

Applicant: DENSO CORPORATION

Inventor： Yusuke KAWAMOTO ,  Yusuke TODO ,  Hiroo IMAMURA ,  Mitsunobu NAKATO

IPC: G01N27/419 ,  G01N27/407 ,  G01N27/417 ,  G01N33/00

Abstract: A gas sensor, an oxygen concentration measuring unit, and a computation unit are included. The gas sensor measures a concentration CNOX of specific gas contained in measured gas. The oxygen concentration measuring unit measures a concentration CO2 of oxygen in the measured gas outside the gas sensor. The gas sensor has a measured gas chamber, a reference gas chamber, a diffusion resistance unit, a pump cell, and a sensor cell. The computation unit computes a concentration CNOX of the specific gas by using the concentration CO2 of oxygen measured by using the oxygen concentration measurement unit and the sensor current.