Humidity effects on the stability of a solid polymer electrolyte oxygen sensor

He qing Yan, Chung chiun Liu

Research output: Contribution to journalArticlepeer-review

15 Scopus citations


The long-term stability and the effect of humidity on a solid polymer electrolyte (SPE) electrochemical oxygen sensor have been investigated. The sensor exhibits good stability and fast response in room air at ambient temperature over a reasonable humidity range during a five-month period of time. When the relative humidity is either very high, i.e., higher than 96%, or very low, i.e., lower than 32%, the sensor performance deteriorates. This deterioration is, however, temporary, and the sensor performance can be restored by placing the sensor in a reasonable humidity environment. The water-retention capacity of the solid polymer electrolyte is affected by the humidity in the environment, contributing to the instability of the sensor.

Original languageEnglish
Pages (from-to)133-136
Number of pages4
JournalSensors and Actuators, B: Chemical
Issue number2
StatePublished - Jan 1993


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