Mineral Insulated cables, in short MI Cable, are also sometimes called ‘metal mineral insulated metal sheathed’ (MIMS) cable or MICC. The acronym MICC stands for Mineral Insulated Copper Cable.
A mineral insulated thermocouple cable consists of two conductors (sometimes even four or six) of dissimilar metals. These conductors are joined on one side on which temperature should be measured (hot junction). When properly joined, a voltage is produced that can be read to determine temperature. The dissimilar metals are insulated with high quality magnesium oxide and covered with a corrosion resistant sheath material, such as Inconel or Stainless steel.
Mineral insulated thermocouple cables can provide stable and fast temperature measurement readings and are often used for high temperatures (up to 1250⁰C) in hazardous environments. The purpose of the mineral insulation (MgO) is to provide better insulation resistance at high temperatures.
RTD Cable in contrast to thermocouple (TC) cable are limited to a maximum temperature of 500°C. TC Cable can go up to 1500°C. RTDs however are superior to thermocouples in that their readings are more accurate and they produce more stable readings over a longer period of time.
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