• Housing Material: 316 Stainless
• Window Material: Sapphire – Single Chrystal
• Temperature operating range: 0 Kelvin to 200C
• Pressure safety factor: Minimum 1.25x
• Thermal shock resistance: Excellent
• Impact resistance: Excellent
• Leak Rate: Equivalent to the permeation rate through glass (~zero)
• Chemical resistance: Excellent for solvents, caustics and acids including Fluorinated acids

All Rayotek KF (QF, NW) sight window metal housings are CNC machined, not cast, to exacting standards. Metal and window materials for all of our sight windows are traceable and certified back to their raw material sources to insure the highest, repeatable quality and reliability.

For configuration and applications outside of the scope of this sight window page please see our Custom Sight Window page or contact Rayotek Sight Windows directly to speak with a representative or engineer.

316 Stainless Steel KF (QF, NW) Housing With Sapphire Bonded Window:

Using proprietary adhesive bonding systems, Rayotek seals a sapphire window into Stainless steel housing for an extremely durable and scratch resistant sight window system that is also highly chemical and heat resistant up to 200C in most environments. In addition, sapphire has a wide transmission spectrum from approximately .170 microns to 6 microns allowing for UV and IR viewing, inspection and microscopy. Our applicable sealing systems are NASA low outgassing approved for high vacuum systems and aerospace applications.