AEROPAK®Mineral Insulated Thermocouple

AEROPAK is our trademark for sheathed thermocouples.The structure of AEROPAK is a thin tube (sheath) made of stainless steel or heat-resistant steel, a thermocouple element enclosed within the tube, and magnesium oxide of an inorganic insulator firmly packed around the element.

Protection Tube Type Thermocouples/Coated Thermocouples

They are conventional thermocouples whose structure is to protect the elements of thermocouples from the atmosphere of measuring targets.
Currently, sheathed thermocouples are more widespread than protection tube type thermocouples; however, for platinum based noble metal thermocouples, the protection tube type is more widespread than the sheathed type since with the sheathed type, manufacturing is difficult, and there is a limitation on costs.