Nisshin Steel Co., Ltd.

Yukimi Miwa

Yusuke Hirose

Toshiro Yamada

Ryuji Tanoue

Shigeo Matsubara

Iwao Katayama

A zirconia oxygen sensor for measuring oxygen potential in the molten bath of a metal or alloy having a melting point of 350-550.degree. C., which comprises a reference electrode which is of a substance having a melting point of the same level as or lower than the metal or alloy of which the oxygen potential is to be measured and being liquid at the measurement temperature and is open to the atmosphere, a vessel of a zirconia solid electrolyte containing 5-10% yttria or 10-20% of calcium oxide (CaO) and a lead wire which connects the reference electrode and said molten metal or alloy and its use are disclosed.

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Amagasaki, Japan

Yukimi Miwa