Sapphire tube for thermocouple sheath
  • Extremely hard, strong and wear resistant
  • Excellent thermal conductivity/heat resistance
  • Exceptionalchemical stability
  • Excellent transmission bandwidths (UV to IR)
  • Blank substrates, AR-coated pieces, and precision windows are available
  • Sapphire possesses nice light transmission in 0.20 ~ 5.50μm wave band, is ideal for laser and infrared optical materials. Products widely used in endoscope,watch glass, optical lens, surface acoustic wave filter, military infrared window, optical filter, observation window for high/low temperature and cosmetic instrument windows, etc. We can provide anti-reflection film, high-reflective film, dielectric film, filter film and metallized film services.

    Single crystal sapphire exceptional chemical stability and corrosion resistance, 100% gas tightness, high melting temperature of 2030 °C, excellent thermal conductivity and heat resistance. Sapphire tube is ideal material for the protection of thermocouples in corrosive environment. The super reliability of sapphire protection tube significantly improve life expectancy of the thermocouple and reduce interruptions and shutdowns in operation.

    AOG SAPPHIRE offers a wide of high quality customized all-surfaces-polished sapphire tubes and fine ground sapphire tubes, such as Capillary tube , Polished sapphire tube, Sapphire plasma tube and Sapphire thermocouple tube.


    Sapphire Capillary Windows


    Sapphire Capillary Windows

    Specifications of Sapphire Thermocouple Tube

    Material Sapphire (Al2O3)
    Diameter 2mm ~ 100mm, customize available
    Diameter Tolerance +/-0.05 mm
    Length 0.1mm ~ 150mm, customize available
    Length Tolerance +/-0.01 mm
    Surface Quality 40/20, 20/10 S/D
    Surface Accuracy 0.5-0.2
    Clear Aperture >90%
    Parallelism 30 arc sec
    Chamfer/Bevel < 0.25mm*45°
    Coating No/AR coating or customized available

    Price list and specification index

    If need other specifications and quantities products, please contact us(
    Part Number Outer Dia. Inner Dia. Length Coating Price
    TCT-Sapphire-001 5.00 mm 3.00 mm 100.00 mm Uncoated contact us


  • Anti-reflection coatings are also available at your specified wavelength.
  • Sapphire transmits ultraviolet light, but sometimes exhibit fluorescence when subjected to powerful ultraviolet sources. For this reason, they are best suited for use with visible to infrared wavelengths.
  • Be sure to wear laser safety goggles when checking optical path and adjusting optical axis.
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    HYT Sapphire Optics focused on the precision manufacturing of high-quality sapphire components, and strived to create sapphire optical windows, fine holes, rods, balls, tubes and other automated, intelligent products and chemical production line.

    Copyright © 2002 HYT Sapphire Optics Co,.Ltd.