A method and apparatus for accurately measuring superheat, bath ratio and alumina concentration in an aluminum smelting bath. In one embodiment, a reusable probe determines the bath temperature and bath sample superheat. In other embodiments, the probe also determines bath composition including bath...http://www.google.ca/patents/US20050069018?utm_source=gb-gplus-sharePatent US20050069018 - Molten cryolitic bath probe
