3/8" NPT Sapphire Bonded into 316 Stainless Housing, IP - 4000PSI MAX

Rayotek’s 316 stainless steel/sapphire bonded NPT Sight Windows are rugged, optical grade Sight Windows. Using proprietary adhesive bonding systems, Rayotek seals C-axis sapphire windows into stainless steel housings for a clean, high strength, scratch resistant Sight Window. Our sapphire Sight Glasses are designed for industrial to high tech applications such as laser measuring, spectroscopy, petroleum exploration and particle analysis.

In addition, sapphire has a wide transmission spectrum from approximately 170nm to 6 microns, allowing for UV and IR viewing, inspection and microscopy.