Title:
GAS SENSOR
Document Type and Number:
Japanese Patent JP2023132816
Kind Code:
A
Abstract:
To provide a gas sensor that can be favorably used even under rich atmosphere.SOLUTION: The sensor element comprises: a plurality of inner voids sequentially communicating with each other from a gas introduction port under predetermined diffusion resistance, and each including an inner electrode; an outer electrode arranged in a site other than the inner void; a porous body region covering the outer electrode; and a plurality of electrochemical pump cells capable of taking in or discharging oxygen between the corresponding inner void and the outside of the element. A ratio A/B is 0.07 or more, where A denotes the amplitude of limit current when a main pump cell takes in oxygen into the first inner void in a case where a pump-in current evaluation gas with known oxygen concentration is introduced, the main pump cell including a main pump electrode as the inner electrode included in a first inner void positioned at a tip of the introduction port and an out-of-void pump electrode; and B denotes the amplitude of limit current when oxygen is taken out from the first inner void in a case where a pump-out current evaluation gas with known oxygen concentration is introduced.SELECTED DRAWING: Figure 1
Inventors:
WATANABE YUSUKE
HASHIKAWA RYO
HASHIKAWA RYO
Application Number:
JP2022038359A
Publication Date:
September 22, 2023
Filing Date:
March 11, 2022
Export Citation:
Assignee:
NGK INSULATORS LTD
International Classes:
G01N27/416; G01N27/419
Attorney, Agent or Firm:
Hidetoshi Yoshitake
Takahiro Arita
Kazuki Nakao
Hiroyuki Kita
Takahiro Arita
Kazuki Nakao
Hiroyuki Kita
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