Sight Glasses

The Dietze Group’s hermetic sight glasses commonly serve as level indicators and as visual inspection glasses. A wide variety of housing shapes can be manufactured, with or without flange, with or without thread. The glass can also be shaped in various prism forms (e.g. circular prism) to enable measurements with optical instrumentation.

Key features:

  • Hermetic sight glasses using glass-to-metal sealing technology
  • Housing Geometry and optional thread according to customer needs
  • Various regular and stainless steels as housing material possible
  • Various surface plating options (e.g. for corrosion resistance)
  • Customized glass shape possible (e.g. prism viewing area)
  • High burst strength possible
  • Certified according to PED 97/23/EC as well as AD 2000