This thermocouple is suggested for pickling baths, and chemical and acid vats. It consists of a 20 gauge element inside .188” o.d. Teflon FEP coated tube. Teflon FEP is resistant to most acids and bases, dry fluorine at 300°F, molten sodium hydroxide, and steam up to 450°F. Among the organics, nearly complete resistance is shown to aliphatics, aromatics, alcohol, acids, and chlorinated solvents