Mineral insulated Thermocouples are metal sheathed and have magnesium oxide (MgO) insulation offering a sealed rugged enclosure capable of withstanding very high temperatures, pressure, and excessive vibration. MI sensors are flexible and are available as of 0,25 mm Thermocouple types K, T, J, E, R, S, and N are available in accordance with ANSI or IEC with thermocouple plug, jack, or a sealed connection cable.