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Flow Indicators & Sight Glasses

Note: Due to the dangerous nature of this product, please nominate the following when placing an enquiry:

  • Pressure
  • Temperature
  • Product

Safety Warning:

Improper installation or maintenance can cause glass breakage which may result in bodily injury.

Always wear safety glasses when looking through a sight glass on operating process equipment.


  • DO NOT re-use any glass, sealing or cushion gaskets.
  • DO NOT attempt to clean glass or adjust cover plate bolts while unit is in operation.
  • DO NOT use glass that is scratched or chipped.
  • DO NOT bump, impact or scratch the glass lenses.

Once a sight glass has been removed from its mounting in process equipment or a boiler, regardless of the reason for removal, it is highly recommended you discard the glass and substitute a new piece.

Used sight glasses may contain hidden damage and present safety risks.