NPT Sight Window: Sapphire Brazed into Niobium Housing
 
  • Housing Material: Niobium (Nb)
  • Window Material: Sapphire C-Axis optical grade
  • Temperature operating range: 0 Kelvin to 850C
  • Pressure safety factor: Minimum 2x
  • Abrasion resistance and strength: Excellent, second only to diamond
  • Optical transmission: Deep UV thru visible to far-IR
  • Leak Rate: Ultra-high vacuum rated
  • Chemical resistance: Excellent but must be tested for specific chemicals

Rayotek’s Niobium/sapphire brazed NPT Sight Windows are rugged, optical grade high temperature rated Sight Windows. Rayotek sapphire braze-sealed into niobium Sight Windows can perform reliably up to 850C in many environments with high transmission in the UV, visible and IR. Please contact the Rayotek Sight Window engineering team for more details and assistance with your application.

For higher temperature requirements up to 1900C, see our Custom Sight Window page.

Click on Part Number for Drawings, Purchase & Volume Pricing.

NPT PIPE SIZE
(in)
CLEAR APERTURE
(in)
CLEAR APERTURE (mm)
MAX PRESSURE (psi/bar)
EXTERNAL INTERNAL VACUUM
HEX SIZE (in)
HEX SIZE (mm)
PART NUMBER
1/4
0.26
6.6
4000/276
EP, IP, VAC
0.69
17.5
3/8
0.33
8.4
4000/276
EP, IP, VAC
0.81
20.6
1/2
0.34
8.6
4000/276
EP, IP, VAC
1.00
25.4


Contact Rayotek Sales for higher volume price discounts and UHP (10,000PSI) brazed sapphire Sight Windows

Back to NPT (and BSPT) Configuration Page.