Sight Glasses / Sapphire Windows

Process monitoring without reliability concerns.

The Dietze Group’s hermetic sight glasses commonly serve as level indicators or as visual inspection windows. The glass, which is directly sealed to the metal housing, can be shaped in various prism forms (e.g. circular prism) to enable measurements with optical instrumentation. Tailored toward refrigeration applications we are certified according to the directives PED 97/23/EC and AD 2000.

Hermetic sapphire windows for optical sensors.

A sapphire window or prism can be hermetically sealed to a stainless-steel housing with an intermediate sealing glass. These high-end devices are employed for autoclavable medical sensors, high-vacuum instrumentation and in process analytics for the food industry.

Key features:

  • Hermetic sight glasses using glass-to-metal sealing
  • Sapphire windows with intermediate sealing glass
  • Carbon-steel and stainless-steel housing options
  • Various surface plating options
  • Customized glass shapes
  • Optional float indicator and frost shield
  • Operation pressure higher than 100 bar
  • Certified according to PED 97/23/EC and AD 2000

hermetic sapphire window