Glass consultant for circular sight glass plates made of sapphire glass

Sapphire glass can be used at temperatures up to 2000 °C. Sapphire glass is generally suitable for pressure applications; the pressure resistance increases depending on the material thickness in relation to the external diameter and free view diameter. We are happy to assist you in selecting a suitable glass. Please feel free to contact us.

Technical changes and calculation errors reserved.

Technical Properties


Water resistance according to DIN 12111 Hydrolysis class 1
Acid resistance according to DIN 12116 Acid class 1
Alkali resistance according to DIN 52322 Alkali class 1


Bending tensile strength up to 690 N/mm² / 100,000 psi (design criterion)
max. operating temperature 2000 °C / 3632°F (short-term)


Dimensional tolerances available upon request

Enter either the pressure or the material thickness – the missing value will be calculated for you automatically!

Glass consultant round sapphire glass

All information is provided without guarantee. Errors and omissions excepted.

Portrait von Dirk Göttgens
Portrait von Dirk Göttgens

Would you like personal advice?

Benefit from our expert knowledge in process monitoring. Our experienced team will provide you with sound advice when selecting the ideal sight glass fittings for your specific requirements. Schedule your personal consultation now!
Dirk Göttgens
Executive management
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