Thermocouple Type K: NiCr-NiAl thermocouples are suitable for use in oxidising or inert gas atmospheres up to 1,200 °C / 2,192 °F (ASTM E230: 1,260 °C / 2,300 °F) with the largest wire size. Thermocouple Type J: Fe-CuNi thermocouples are suitable for use in vacuum, in oxidising and reducing atmospheres or inert gas atmospheres. They are used for temperature measurements up to 750 °C / 1,382 °F (ASTM E230: 760 °C / 1,400 °F) with the largest wire size. Thermocouple Type N: NiCrSi-NiSi thermocouples are suitable for use in oxidising atmospheres, in inert gas atmospheres or dry reduction atmospheres up to 1,200 °C / 2,192 °F (ASTM E230: 1,260 °C / 2,300 °F). They must be protected from sulphurous atmospheres. They are very accurate at high temperatures. The source voltage (EMF) and the temperature range are almost the same as with type K. They are used in applications where a longer service life and greater stability are required. Thermocouple Type E: NiCr-CuNi thermocouples are suitable for use in oxidising or inert gas atmospheres up to 900 °C / 1,652 °F (ASTM E230: 870 °C / 1,598 °F) with the largest wire size. Thermocouple Type T: Cu-CuNi thermocouples are suitable for temperatures below 0 °C with an upper temperature limit of 350 °C / 662 °F (ASTM E230: 370 °C / 698 °F) and can be used in oxidising, reducing or inert gas atmospheres. They do not corrode in moist atmospheres. The information on the use of sheathed thermocouples refers to versions with direct contact to the medium. We recommend that you clarify the temperature range, accuracy classes and dimensions of these "noble" PtRh-Pt (platinum/rhodium-platinum) mineral-insulated thermocouples with your responsible contact person.