Influence of Carbon Dioxide on the Characteristics of a Limiting Current Oxygen Sensor

Zhen Zhou; Jia Wen Jian; Xiang Wu

doi:10.4028/www.scientific.net/AMM.130-134.4202

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 130-134Influence of Carbon Dioxide on the Characteristics...

Influence of Carbon Dioxide on the Characteristics of a Limiting Current Oxygen Sensor

Abstract:

The influences of CO₂ on the characteristics of a limiting current oxygen sensor in CO₂- O₂-N₂ atmospheres were investigated. The studies indicated that the I-V curves appeared two-stage current plateau at (0~2) V operation voltage in CO₂-O₂-N₂ atmospheres with CO₂ concentration changed from 2.03% up to 12.18% and oxygen concentration remained at 5%、7.5%、10%, respectively. The first saturated current I_L1 appeared in the voltage range of 0.8～1.4 V while the second saturated current I_L2 appeared in 1.65～1.82 V, respectively. The difference between the two current platforms (I_L2-I_L1) and (-ln(1-X_CO2)) showed a good linear relationship. And the oxygen sensor’s up-response time and down-response time to CO₂ were both within 30s. The concentration of CO₂ can be detected at a high working voltage.

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Periodical:

Applied Mechanics and Materials (Volumes 130-134)

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4202-4205

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.130-134.4202

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Online since:

October 2011

Authors:

Zhen Zhou, Jia Wen Jian, Xiang Wu

Keywords:

CO₂- O₂-N₂, I-V Curves, Limiting Current Oxygen Sensor

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References

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