High Purity Alumina Ceramic Rings

High alumina ceramic rings for image intensifer tubes

High Purity Alumina Ceramic Rings

High Purity Alumina Ceramic Rings

CUMI’s high alumina (97.5%) ceramic rings are used in image intensifier tubes for night vision equipment and other instruments. Ultra-high vacuum compatibility (10-8 to 10-9 mbar.l/s) and best in class dielectric strength (~13 kV/mm in AC and 42 kV/mm in DC) make it the preferred choice for night vision devices.

CUMI Ceramics offers high purity Alumina Ceramic Rings for high dielectric strength and other critical quality parameters. Call us at +91-4344-304700/ +91-4344-304745 or alternatively mail us at for a free quote.



Shape As per customer specification
Size As per customer specification
Colour Pearly white
Properties Lightweight, High dielectric strength, Infinitesimal leakage current


  • Head-mounted night vision camerasAutomotive
  • SpectrometersAutomotive
  • Medical imaging device
  • Surveillance cameras


  • 66% lower leakage current in comparison to the benchmark specification.
  • 30% lesser price while maintaining same critical quality parameters.

cumi advantage

  • Established partner of choice for co-creation opportunities
  • Economies of experience generated over the years working with world leaders
  • Customised solutions

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"Enabling Industries, Touching Lives" We are eager to work with you on exciting opportunities & providing solutions. Our experts will connect with you to understand your needs and provide the most effective solution.

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47,48(Part),Sipcot Industrial Complex,

Hosur – 635126, Tamilnadu, India

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+91-4344 – 614700 / 8220019154 ; 614745

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+91-4344 – 614718; 614762

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+91 – 4344 – 614747

+91 – 4344 – 614736

+91-4344 – 614809