MIDDIA High-Temperature Silicon Nitride Ceramic Protection Tube (Item No. SN05)

Engineered for molten metal temperature measurement, high-temperature industrial furnaces, thermocouple protection, and aggressive chemical processing, MIDDIA SN05 Silicon Nitride (Si3N4) Ceramic Protection Tubes provide exceptional thermal and mechanical endurance. Manufactured from hot-pressed high-density silicon nitride ceramic, these protection sheaths feature extreme surface hardness, superior fracture toughness, and high mechanical impact resistance. Featuring a very low coefficient of thermal expansion combined with high thermal conductivity, SN05 tubes deliver outstanding thermal shock resistance, enduring rapid heating and cooling cycles without cracking. Silicon nitride is non-wetting to non-ferrous molten metals (such as aluminum, zinc, and copper alloys), preventing metal slag adhesion and corrosion erosion during continuous temperature monitoring. Chemically inert and non-porous, they safeguard internal thermocouple sensors from gas oxidation and chemical attack (recommended for optimal continuous operation up to 1200 degrees Celsius). Available in one-end closed, perforated, or straight tube configurations with custom inner/outer diameters, wall thicknesses, and mounting steps, MIDDIA provides comprehensive OEM/ODM precision machining, low MOQ wholesale orders, and fast global delivery.