Precision Alumina Ceramic Tube for Thermowells
High-precision 96% alumina ceramic tube for protecting temperature sensors in harsh industrial environments. Refractory fired construction for continuous high-temperature service, classified HTS 6903.20.00.00.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If lower temperature decorative applications
Porcelain lab ware has separate classification from refractories.
If imported as assembled thermometer component
Complete temperature instruments classified by function.
If alternative refractory material composition
Non-alumina refractories use different subheading.
Not sure which classification is right?
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Import Tips & Compliance
• Provide tolerance specifications and surface finish measurements
• Classify as refractory sheath, not electrical component
• Include application temperature range documentation
Related Products under HTS 6903.20.00.00
Alumina Crucible for Laboratory Use
High-purity alumina crucible designed for melting and holding metals or chemicals in laboratory furnaces, containing over 90% Al2O3 by weight. Fired after shaping at high temperatures exceeding 800°C, it qualifies as a refractory ceramic good under HTS 6903.20.00.00 due to its alumina content and use in high-temperature processes.
High-Alumina Ceramic Nozzle for Continuous Casting
Refractory nozzle made from alumina-silica mixture (>70% Al2O3) used in steel continuous casting to control molten metal flow. Fired ceramic construction withstands extreme temperatures, classified under HTS 6903.20.00.00 as other refractory ceramic goods.
Alumina Thermocouple Protection Tube
Fired alumina ceramic tube (99% Al2O3) protecting thermocouples in high-temperature furnaces and kilns. Essential refractory component for temperature measurement in industrial processes, falling under HTS 6903.20.00.00.
Refractory Alumina Slide Gate Plate
High-alumina (85% Al2O3) ceramic plate used in steel ladle slide gate systems to control molten steel flow. Precision-fired refractory component essential for steelmaking, classified under HTS 6903.20.00.00.
High-Purity Alumina Ceramic Rod for Kilns
99.5% alumina ceramic rod used as support in high-temperature kilns and sintering furnaces. Fired refractory goods designed for structural support under extreme thermal conditions, HTS 6903.20.00.00.
Alumina Ceramic Retort for Chemical Processing
Fired alumina retort (>80% Al2O3) used for high-temperature chemical reactions and distillation. Refractory vessel withstands corrosive environments and thermal shock, classified HTS 6903.20.00.00.