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A viewport, sometimes referred to as a window, is an optical component that provides a means for visual, optical or broad-band energy transmission in and out of a vacuum system.

There are two types of viewports offered, zero-length and tubulated. A zero-length viewport has a thickness no larger than that of its mounting flange. This makes it easier to protect from accidental damage as there are no parts protruding from the mounting flange. It also allows for the best angle of view.
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0.55 Inch (in) View Diameter Weld Installation Sapphire Viewport Sight Glass (17105-01-W)

0.55 Inch (in) View Diameter Weld Installation Sapphire Viewport Sight Glass
0.55 Inch (in) View Diameter Weld Installation Sapphire Viewport Sight Glass (17105-01-W)

0.94 Inch (in) View Diameter Weld Installation Sapphire Viewport Sight Glass
0.55 Inch (in) View Diameter Weld Installation Sapphire Viewport Sight Glass (17105-01-W)

1.94 Inch (in) View Diameter Weld Installation Sapphire Viewport Sight Glass
0.55 Inch (in) View Diameter International Organization for Standardization (ISO) Flange Sapphire Viewport Sight Glass (17106-01-KF)

0.55 Inch (in) View Diameter International Organization for Standardization (ISO) Flange Sapphire Viewport Sight Glass
0.55 Inch (in) View Diameter Weld Installation Sapphire Viewport Sight Glass (17105-01-W)

0.94 Inch (in) View Diameter International Organization for Standardization (ISO) Flange Sapphire Viewport Sight Glass
Description N/A A viewport, sometimes referred to as a window, is an optical component that provides a means for visual, optical or broad-band energy transmission in and out of a vacuum system.

There are two types of viewports offered, zero-length and tubulated. A zero-length viewport has a thickness no larger than that of its mounting flange. This makes it easier to protect from accidental damage as there are no parts protruding from the mounting flange. It also allows for the best angle of view.
Brands N/A Ceramaseal®
Installation N/A Weld N/A Weld N/A Weld N/A International Organization for Standardization (ISO) Flange N/A International Organization for Standardization (ISO) Flange
Installation Size N/A N/A N/A N/A NW16KF N/A NW40KF
Flange Size N/A
Temperature Range N/A -269 to 450 ºC N/A -269 to 450 ºC N/A -269 to 450 ºC N/A -25 to 205 ºC N/A -25 to 205 ºC
Transmission Range (80 % Minimum) N/A 0.25 to 4 µ
Housing Material N/A 52 Nickel Iron
Optic Material N/A Sapphire
Magnetic Material N/A true
Internal Pressure N/A 1 x 10-10 Torr
Pressure at 20 Degree Celsius (ºC) Temperature N/A 400 psig27.6 bar N/A 160 psig11 bar N/A 50 psig3.4 bar N/A 400 psig27.6 bar N/A 160 psig11 bar
View Diameter N/A 0.55 in14 mm N/A 0.94 in24 mm N/A 1.94 in49 mm N/A 0.55 in14 mm N/A 0.94 in24 mm
Extreme/Custom Design N/A
  • Double viewports
  • Viewing diameters exceeding 7 inches
  • Internal pressures to 80,000 psig
  • RF applications and special configuration requirements
Applications N/A A few of the many applications in which these viewports are commonly used are:
  • Semiconductor processing equipment
  • Accelerators
  • Furnaces
  • Instrumentation
  • Analytical test and measurement equipment
  • CO2 lasers
  • Multispectral applications
  • Optical imaging
  • Materials processing
  • Thermometry
  • Pyrometry
  • Telecommunications
  • Analytical Equipment
  • Oil Exploration
  • R&D
  • High Energy Physics
  • Military/Defence
  • Biotechnology
New Products N/A
  • Extended Range Viewports
  • Differentially Pumped Viewports
Additional Information N/A CeramTec's precision-engineered Ceramaseal® viewports are available with a choice of two viewport materials: sapphire or fused silica. Other viewport materials are available upon request.

CeramTec offers a UV grade fused silica viewport with a 1.37" view diameter that can be used for cryogenic applications.

Sapphire should be used in the most demanding applications, as this material provides extended transmission, temperature, pressure and wear resistance.

To select the right window for your applications, you should consider size, transmission requirements, temperature, pressure, and aggressiveness of environment.

Advanced Ceramic-to-Metal & Glass-Ceramic Sealing Technology.