ACCURATE MONITORING OF LOW OXYGEN ACTIVITY IN GASES WITH CONVENTIONAL OXYGEN GAUGES AND PUMPS

J. FOULETIER; E. SIEBERT; A. CANEIRO

Science and Technology of Zirconia II

American Ceramic Society

Año: 1984 vol. 12 p. 618 - 623

0730-9546

It is possible to accurately monitor low oxygen activities in gases with an oxygen electrochemical pump and a gauge fabricated with good quality industrial ZrO//2 tubes under appropriate experimental conditions. Trial experiments were performed on gaseous mixtures prepared by electrochemical pumping of oxygen in argon by electrochemical reduction of pure carbon dioxide and by electrochemical oxidation of pure hydrogen and argon-hydrogen mixtures. An accuracy of 2% on the oxygen activity measurement can now be obtained over the whole range of pressures investigated.