Platinum insulator type thermocouple elements are available with either Mullite or high purity Alumina insulators. To minimize the possibility of silica contamination Alumina insulators are recommended for temperatures above 2400F (1316C). In either case a single one-piece insulator is used on elements 60 inches or less in length. The use of a one-piece insulator provides optimum support and protection for the delicate platinum conductors. As a standard feature platinum elements are terminated with copper sleeves. Copper sleeves provide a convenient, durable means of connecting platinum elements to a connector block without damaging the soft platinum conductor wires.