Larson Electronic Glass Non-Magnetic glass viewports are supplied with fully annealed, commercial grade, optical quality glass windows in ten standard sizes from ¾” through 6”. Good optical and physical properties make them the preferred choice where sensitivity to magnetic permeation is a concern. These windows are not available in Zero Length. They are offered without flanges, with CF type flanges for use below 1x10-11 Torr, and in ISO type o-ring seal flanges for use in intermediate vacuum ranges. Window surfaces offer a minimum of distortion and provide maximum light transmission suitable for most applications. Custom viewports are also available.
Larson Electronic Glass offers "304 Stainless Steel-Non Magnetic Viewports" available in 10 standard sizes from 3/4 inch through 6 inch with a variety of flange options. Dimensions are in inches unless otherwise noted.