A thermocouple structure capable of measurement of a high temperature with a high accuracy is constituted of a protective pipe made of a heat-resistant ceramic; a pair of wires differing in kind and extending in the protective pipe from one end thereof to the other end thereof in the longitudinal...http://www.google.fr/patents/US5696348?utm_source=gb-gplus-shareBrevet US5696348 - Thermocouple structure
