Compacted MgO Thermocouples

All Temprel MgO insulated thermocouples are made using the highest purity MgO for temperatures up to 2300F (1260C). The thermo-elements are all ANSI special limits of error to give your measurements the best possible results. The various sheath materials are dependent on the application and the following will help you make the best selection.
304 SS - Maximum temperature of 1650F (900C) and is the most widely used low temperature sheath material. It offers good corrosion resistance but is subject to carbide precipitation in the 900F to 1600F (480 to 870C) range.

310 SS - Maximum temperature of 2100F (1150C) and offers good mechanical and corrosion resistance similar to 304 SS. Very good heat resistance. Not as ductile as 304 SS.

316 SS - Maximum temperature of 1650°F (900C) and has the best corrosion resistance of the austenitic stainless steels. Subject to carbide precipitation in the 900F to 1600F (480 to 870C) range.

Inconel - Maximum temperature 2150°F (1175°C) and is the most widely used thermocouple sheath material. Good high temperature strength, corrosion resistance and is resistant to chloride-ion stress corrosion, cracking and oxidation. Do not use in sulfur bearing environments.

Hastelloy X – Maximum temperature 2200F (1205C) widely used in aerospace applications. Resistant to oxidizing, reducing and neutral atmospheric conditions. Excellent high temperature strength.

Standard sheath diameters .032” +.001 -.0005" .040” +.001 -.0005” .063” ±.001” .090” ±.001” .125” +.002 -.001” .188” +.002 -.001” .250” +.003 -.001”

Suggested Upper Temperature Limits 1290°F (700°C) 1290°F (700°C) 1690°F (920°C) 1830°F (1000°C) 1960°F (1070°C) 2100°F (1150°C) 2100°F (1150°C)

All MgO compacted thermocouples can be bent on a radius of twice the sheath diameter.

If you don't see what you are looking for here, or if you have additional questions please feel free to contact Temprel at 1-800-582-5098.