Title:
GAS SENSOR
Document Type and Number:
WIPO Patent Application WO/2023/248799
Kind Code:
A1
Abstract:
Provided is a gas sensor that can maintain high detection accuracy of a measurement target gas among gases to be measured. This gas sensor 100, which detects a measurement target gas among gases to be measured, includes a sensor element 101 and a control device for controlling the sensor element 101, wherein the control device includes: a storage unit that stores, in advance, a required oxygen amount that should be present inside a reference gas chamber 43 when the oxygen concentration of the reference gas inside the reference gas chamber 43 is a prescribed concentration; and a processing unit that performs a refresh process which causes current to flow between a pump electrode 23 provided at a position different than the inside of the reference gas chamber 43, and a reference electrode 42 provided inside of the reference gas chamber 43, pumps oxygen present inside the reference gas chamber 43 from the reference gas chamber 43, and thereafter pumps oxygen of the required oxygen amount stored in advance by the storage unit to the reference gas chamber 43.
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Inventors:
WATANABE YUSUKE (JP)
Application Number:
PCT/JP2023/021170
Publication Date:
December 28, 2023
Filing Date:
June 07, 2023
Export Citation:
Assignee:
NGK INSULATORS LTD (JP)
International Classes:
G01N27/416
Foreign References:
| JP2021156647A | 2021-10-07 | |||
| JP2007278732A | 2007-10-25 | |||
| JP2019158866A | 2019-09-19 | |||
| JPH11201931A | 1999-07-30 | |||
| JPH1038846A | 1998-02-13 |
Attorney, Agent or Firm:
OKADA, Masahiro et al. (JP)
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