Mineral Insulated Cable, from dia 0.25mm to 12.7mm. ... materials and diameters, such as high temperature furnace thermocouples. Mineral insulated cable for thermocouple use: Measure range: K, E, J, ... Duplex, TriplexSample1 MI thermocouple with J extension wireMI cable for RTD use:Conductor: Ni,CuOuter dia.: 2~8mm Sheath: SS304, ... Duplex, TriplexSample 2 MI RTD with connector Mineral Insulated Cable