{"id":1258,"date":"2026-01-26T16:53:01","date_gmt":"2026-01-26T08:53:01","guid":{"rendered":"https:\/\/www.sapphire-glass.net\/?post_type=product&p=1258"},"modified":"2026-01-26T16:53:51","modified_gmt":"2026-01-26T08:53:51","slug":"high-grade-sapphire-tube-thermocouple-protection-tube-aluminum-oxide-polished-high-temperature-corrosion-resistant","status":"publish","type":"product","link":"https:\/\/www.sapphire-glass.net\/en\/product\/high-grade-sapphire-tube-thermocouple-protection-tube-aluminum-oxide-polished-high-temperature-corrosion-resistant\/","title":{"rendered":"High-Grade Sapphire Tube Thermocouple Protection Tube Aluminum Oxide Polished, High Temperature & Corrosion Resistant"},"content":{"rendered":"

Product Description<\/strong><\/h3>\n

The Sapphire Tube<\/strong> is a high-performance, single-crystal aluminum oxide (Al\u2082O\u2083) tube designed to offer exceptional protection for thermocouples in extreme environments. Renowned for its superior hardness, high thermal resistance, chemical inertness, and mechanical strength, sapphire tubes are ideal for applications in industries such as semiconductor manufacturing, aerospace, power generation, chemical processing, and laser systems.<\/p>\n

These polished sapphire tubes are engineered to withstand high temperatures up to 2000\u00b0C (3632\u00b0F), offering reliable protection against mechanical stress, corrosive substances, and thermal shock. With a Mohs hardness of 9 (second only to diamond), sapphire provides unmatched durability, ensuring long-lasting protection for thermocouples and enabling accurate temperature measurements in the harshest conditions.<\/p>\n

Product Specifications<\/strong><\/h3>\n
\n
\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Parameter<\/strong><\/th>\nSpecification<\/strong><\/th>\n<\/tr>\n<\/thead>\n
Material<\/strong><\/td>\nSingle-Crystal Sapphire (Al\u2082O\u2083)<\/td>\n<\/tr>\n
Melting Point<\/strong><\/td>\nApprox. 2,020\u00b0C (3,668\u00b0F)<\/td>\n<\/tr>\n
Thermal Conductivity<\/strong><\/td>\n30 W\/m\u00b7K at 25\u00b0C (varies with temperature)<\/td>\n<\/tr>\n
Density<\/strong><\/td>\n3.98 g\/cm\u00b3<\/td>\n<\/tr>\n
Hardness<\/strong><\/td>\n9 on Mohs Scale (second hardest material after diamond)<\/td>\n<\/tr>\n
Supply Ability<\/strong><\/td>\n1000 pcs\/week<\/td>\n<\/tr>\n
Size Range<\/strong><\/td>\nDiameter: Customizable (typically a few mm to several cm)<\/td>\n<\/tr>\n
Length<\/strong><\/td>\nCustomizable<\/td>\n<\/tr>\n
Packaging<\/strong><\/td>\nFoamed plastic + carton<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

Key Features<\/strong><\/h3>\n
    \n
  • \n

    High Temperature Resistance<\/strong>: Sapphire tubes can withstand temperatures up to 2000\u00b0C, making them ideal for high-temperature applications such as semiconductor manufacturing and aerospace.<\/p>\n<\/li>\n

  • \n

    Mechanical Strength<\/strong>: With a Mohs hardness of 9, sapphire tubes provide excellent protection against mechanical stress, including impact, vibration, and shock.<\/p>\n<\/li>\n

  • \n

    Chemical Resistance<\/strong>: Sapphire\u2019s inherent chemical inertness ensures it is highly resistant to corrosion, acids, bases, and most solvents.<\/p>\n<\/li>\n

  • \n

    Optical Transparency<\/strong>: Sapphire tubes offer optical transparency across UV, visible, and IR spectrums, ideal for applications requiring simultaneous temperature and optical measurements.<\/p>\n<\/li>\n

  • \n

    Thermal Shock Resistance<\/strong>: Sapphire\u2019s low coefficient of thermal expansion allows it to resist thermal shock, ensuring durability in environments with rapid temperature fluctuations.<\/p>\n<\/li>\n

  • \n

    Electrical Insulation<\/strong>: As an excellent electrical insulator, sapphire tubes ensure that thermocouples are not affected by external electrical fields, maintaining measurement accuracy.<\/p>\n<\/li>\n<\/ul>\n

    Applications<\/strong><\/h3>\n
      \n
    • \n

      Semiconductor Manufacturing<\/strong>: Sapphire tubes protect thermocouples in high-temperature furnaces and reactors used during semiconductor processing, ensuring precise temperature monitoring.<\/p>\n<\/li>\n

    • \n

      Aerospace and Aviation<\/strong>: In aerospace, sapphire tubes are used for thermocouple protection in engines, combustion chambers, and thermal protection systems, withstanding extreme heat and mechanical stress during flight.<\/p>\n<\/li>\n

    • \n

      Power Generation<\/strong>: Sapphire tubes are employed in power plants (gas turbines, steam boilers, and nuclear reactors) to protect thermocouples from high radiation, corrosive gases, and extreme temperatures.<\/p>\n<\/li>\n

    • \n

      Chemical Processing<\/strong>: Protects thermocouples in environments exposed to harsh chemicals, acids, and high temperatures, ensuring continuous and reliable temperature monitoring.<\/p>\n<\/li>\n

    • \n

      Laser Systems & High-Temperature Observation<\/strong>: Sapphire tubes are used in laser systems and optical sensors, where both optical transparency and thermal protection are required.<\/p>\n<\/li>\n<\/ul>\n

      Advantages of Sapphire Tubes<\/strong><\/h3>\n
        \n
      • \n

        Durability<\/strong>: Provides long-lasting protection for thermocouples, reducing maintenance costs and downtime.<\/p>\n<\/li>\n

      • \n

        Precision<\/strong>: Ensures accurate temperature readings even under extreme conditions, allowing for optimal process control.<\/p>\n<\/li>\n

      • \n

        Versatility<\/strong>: Compatible with various types of thermocouples, offering flexibility across different industries and applications.<\/p>\n<\/li>\n

      • \n

        Enhanced Safety<\/strong>: Helps maintain the integrity and reliability of temperature measurements, which is critical for ensuring the safety of operations in industries like aerospace and power generation.<\/p>\n<\/li>\n<\/ul>\n

        Frequently Asked Questions (FAQ)<\/strong><\/h3>\n
          \n
        • \n

          Q: What sizes are available for thermocouple protection tubes?<\/strong>
          A:<\/strong> Sapphire thermocouple protection tubes come in various diameters, typically ranging from a few millimeters to several centimeters. Lengths are customizable based on specific application requirements.<\/p>\n<\/li>\n

        • \n

          Q: How do sapphire tubes perform in high-temperature environments?<\/strong>
          A:<\/strong> Sapphire tubes can withstand extreme temperatures up to 2000\u00b0C (3632\u00b0F) without degrading, making them ideal for use in high-temperature applications like semiconductor processing and aerospace.<\/p>\n<\/li>\n

        • \n

          Q: Can sapphire tubes be used for optical measurements?<\/strong>
          A:<\/strong> Yes, sapphire tubes offer optical transparency over a broad spectrum (UV to IR), making them suitable for applications that require both temperature and optical measurements.<\/p>\n<\/li>\n

        • \n

          Q: Are sapphire tubes resistant to chemicals?<\/strong>
          A:<\/strong> Yes, sapphire is highly resistant to a wide range of chemicals, acids, and solvents, making sapphire tubes ideal for use in chemical processing industries.<\/p>\n<\/li>\n

        • \n

          Q: How long does it take to produce a custom sapphire tube?<\/strong>
          A:<\/strong> Production time typically ranges from 2 to 4 weeks, depending on customization requirements.<\/p>\n<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

          The Sapphire Tube<\/strong> is a high-performance, single-crystal aluminum oxide (Al\u2082O\u2083) tube designed to offer exceptional protection for thermocouples in extreme environments.<\/p>","protected":false},"featured_media":1298,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false},"product_brand":[],"product_cat":[40],"product_tag":[41],"class_list":["post-1258","product","type-product","status-publish","has-post-thumbnail","product_cat-sapphire-tube","product_tag-sapphire-tube","first","instock","shipping-taxable","product-type-simple"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.sapphire-glass.net\/en\/wp-json\/wp\/v2\/product\/1258","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.sapphire-glass.net\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/www.sapphire-glass.net\/en\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/www.sapphire-glass.net\/en\/wp-json\/wp\/v2\/comments?post=1258"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.sapphire-glass.net\/en\/wp-json\/wp\/v2\/media\/1298"}],"wp:attachment":[{"href":"https:\/\/www.sapphire-glass.net\/en\/wp-json\/wp\/v2\/media?parent=1258"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.sapphire-glass.net\/en\/wp-json\/wp\/v2\/product_brand?post=1258"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.sapphire-glass.net\/en\/wp-json\/wp\/v2\/product_cat?post=1258"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.sapphire-glass.net\/en\/wp-json\/wp\/v2\/product_tag?post=1258"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}