Mineral insulated thermocouple

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A ther­mo­cou­ple con­sists of two elec­tri­cal con­duc­tors made of dif­fer­ent met­als. They are con­nect­ed to each oth­er at one end and — based on the ther­mo­elec­tric ef­fect — are suit­able for mea­sur­ing tem­per­a­tures. In a min­er­al in­su­lat­ed ther­mo­cou­ple, the con­duc­tors are em­bed­ded (e.g. in mag­ne­sium ox­ide) and sheathed by a tight­ly weld­ed met­al tube. De­pend­ing on the de­sign of the sheath, min­er­al in­su­lat­ed ther­mo­cou­ples are suit­able for very high op­er­at­ing tem­per­a­tures of over 1,000° C. 

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