Characterisation of an oxygen sensor based on In/In2O3 reference electrode

A potentiometric sensor for measuring oxygen activity in LBE has been developed since 2000 until today at ‘Institut Quimic de Sarria’ electrochemistry laboratories. This sensor is based on In/In2O3 reference electrode. The last experiments performed with this sensor have been directed to characterise the sensor. For this purpose, the following experiments in stagnant conditions have been performed: effect of the operating temperature from 300 to 500 °C, different covering gases (N2 + 5% H2, Ar 99.999%, and N2 + 10 mg/L O2) and comparison of different solid electrolytes (ZrO2/Y2O3 and ZrO2/MgO). Long-term experiments have also been performed to the see the stability of the signal with time.