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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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1.13 Inch (in) View Diameter Fused Silica Viewport Sight Glass (11466-09-W)

1.13 Inch (in) View Diameter Fused Silica Viewport Sight Glass
1.13 Inch (in) View Diameter Fused Silica Viewport Sight Glass (11466-09-W)

2.37 Inch (in) View Diameter Fused Silica Viewport Sight Glass
1.13 Inch (in) View Diameter Fused Silica Viewport Sight Glass (11466-09-W)

3.81 Inch (in) View Diameter Fused Silica Viewport Sight Glass
3.81 Inch (in) View Diameter International Organization for Standardization (ISO) Flange Fused Silica Viewport Sight Glass (17109-01-KF)

3.81 Inch (in) View Diameter International Organization for Standardization (ISO) Flange Fused Silica Viewport Sight Glass
1.13 Inch (in) View Diameter Fused Silica ConFlat Flange Viewport Sight Glass (11466-01-CF)

1.13 Inch (in) View Diameter Fused Silica ConFlat Flange 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®
Flange Size N/A N/A N/A N/A N/A 2-3/4 in
Minimum Temperature N/A -65 ºC N/A -65 ºC N/A -65 ºC N/A -25 ºC N/A -65 ºC
Maximum Temperature N/A 200 ºC
Installation N/A Weld N/A Weld N/A Weld N/A International Organization for Standardization (ISO) Flange N/A ConFlat Flange
Installation Size N/A N/A N/A N/A NW50KF N/A NW35CF
Housing Material N/A 304 Stainless Steel
Optic Material N/A UV Grade Fused Silica
Magnetic Material N/A false
Pressure at 20 Degree Celsius (ºC) Temperature N/A 115 psig7.9 bar N/A 35 psig2.4 bar N/A 25 psig1.7 bar N/A N/A 115 psig7.9 bar
View Diameter N/A 1.13 in28.7 mm N/A 2.37 in60.2 mm N/A 3.81 in96.8 mm N/A 1.13 in28.7 mm N/A 1.13 in28.7 mm
Transmission Range (80 % Minimum) N/A 0.25 to 2 µ
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
  • CO2lasers
  • Multispectral applications
  • Optical imaging
  • Materials processing
  • Thermometry
  • Pyrometry
  • Telecommunications
  • Analytical Equipment
  • Oil Exploration
  • R&D
  • High Energy Physics
  • Military/Defense
  • 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.
Note N/A This part is not RoHS compliant.