ClearView™ VHW Series Self-Cleaning Window

The ClearView™ VHW Series windows are self-cleaning viewports for use in deposition environments. The windows consist of an in-vacuum heated quartz disk, thermally isolated behind a standard vacuum window.  Material that would normally cloud or obscure the view through a vacuum window encounters the protective heated disk instead.  The material will re-evaporate from the heated disk at a rate dependent upon its vapor pressure/temperature curve.

The ClearView VHW Series offers two sizes of viewport, the VHW-150 with 1.37" and VHW-250 with 2.37".

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ClearView VHW Series - 1.37" Viewing Diameter

  • 7056 glass vacuum viewport
  • 1.37" diameter viewing area
  • 2.75" O.D. mounting flange
  • Thin profile allows maximum viewing area
  • Fused silica heated element
  • Continuous operation up to 550°C
  • Forced air cooling of housing
  • Suitable for UHV environments
  • Includes variable-temperature power supply
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ClearView VHW Series  - 2.37" Viewing Diameter

  • 7056 glass vacuum viewport
  • 2.38" diameter viewing area
  • 4.5" O.D. mounting flange
  • Fused silica heated element
  • Continuous operation at up to 350°C
  • Water cooled
  • Includes variable-temperature power supply
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Call or email with your requirements and for current pricing.

800.962.2310 / sales@thermionics.com