Solid oxide amperometric CO sensor for monitoring exhaust gas from water heater

Tatsumi Ishihara, Phawachalotorn Armonat, Rie Kadowaki, Oravan Sanguanruang

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

An amperometric CO sensor using a solid oxide electrolyte was studied and it was found that the oxygen pumping current increased with increasing CO concentration when using Au(10 wt%)/In1.9Sn0.1Sn 0.1O3 and RuO2(10 wt%)/La0.6Sr 0.4CoO3 as the electrode catalysts and La 0.9Sr0.1Ga0.8Mg0.2O3 as the electrolyte. Mixed potentials are also observed on this sensor upon exposure to CO, and so changes in oxygen pumping current may be caused by the mixed potentials formed upon exposure to CO. Substitution of Ga in the LaGaO 3 electrolyte with Fe is effective for increasing the sensitivity, and this sensor is almost insensitive to CO2 and CH4. As a result, it is expected that this sensor can be used for the detection of CO in exhaust gas from a small gas water heater without a flue line.

Original languageEnglish
Pages (from-to)183-192
Number of pages10
JournalSensors and Materials
Volume22
Issue number4
Publication statusPublished - 2010

All Science Journal Classification (ASJC) codes

  • Instrumentation
  • Materials Science(all)

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  • Cite this

    Ishihara, T., Armonat, P., Kadowaki, R., & Sanguanruang, O. (2010). Solid oxide amperometric CO sensor for monitoring exhaust gas from water heater. Sensors and Materials, 22(4), 183-192.