A zirconia-based lambda gas sensor with pseudo-reference

Author

Benammar, Mohieddine ; Maskell, William C.

Author_Institution

Energy Technol. Centre, Middlesex Univ., London, UK

Volume

44

Issue

1

fYear

1995

fDate

2/1/1995 12:00:00 AM

Firstpage

42

Lastpage

45

Abstract

A sensor operating on the potentiometric principle without the need for a stable reference gas is described. This was achieved by using a miniature zirconia pump-gauge device including a diffusion path between its internal volume and external atmosphere. A pseudo-reference oxygen partial pressure was generated within the internal volume and acted as a reference for potentiometric determination of the external oxygen partial pressure. The sensor was tested in the normalized air-to-fuel range 0.7 to 1.7 and displayed a characteristic similar to that of a conventional potentiometric sensor with a fixed stable reference, e.g. air

Keywords

electric sensing devices; gas sensors; oxygen; potentiometers; zirconium compounds; O₂; ZrO₂; air-to-fuel ratio; combustion systems; diffusion path; external atmosphere; fixed stable reference; internal volume; lambda gas sensor; miniature zirconia pump-gauge device; noxious emissions; potentiometric determination; potentiometric principle; pseudo-reference; pseudo-reference oxygen partial pressure; stable reference gas; Atmosphere; Cathodes; Electrodes; Electrons; Energy states; Gas detectors; Sensor phenomena and characterization; Solids; Temperature sensors; Testing;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/19.368105

Filename

368105