Characteristic comparision of clark oxygen sensors made from different electrode materials

Abstract

Clark  oxygen  sensors  made  from  different  materials  for  cathodic  electrode  have been fabricated successfully. Their behaviors in terms of response time, reproducibility, stability were investigated. The obtained results indicated that studied Clark oxygen sensors using gold single microelectrode,  array   gold  microelectrode,  platinum  and  conventional  gold,  provide  response time:  6s,  10s, 18s and 23s with their residual  currents:  negligible,  31nA,  63nA  and  62nA respectively. There is a good agreement between DO values measured by studied sensors and Winkler titration. The investigation also showed that among studied sensors, the sensor made of gold microelectrode behaves as the best sensor forfurther application.