SEETRU Sight Glasses


Seetru circular window sight glasses are compact low cost assemblies that provide reliable level indication and positive indication when liquid is present. These screw-in plugs are fitted with high quality glass. They and are suitable for a wide variety of liquids including lubricants and refrigerants. They operate at temperatures up to 180°C and pressures up to 24 bar g. Seetru Circular Window Sight Glasses are, for example, widely used in compressor crank cases and other machine housings and have proved to be highly reliable and economic. Seetru manufacture a wide range of circular window sight glasses with a variety of designs including versions with:
  • Flat glass
  • Domed glass
  • Reflex glass

Sight Glass / Sizes:
1/2" to 2"

Sight Glass / Mediums: Liquid

Sight Glass / Applications: Presence of liquid indicator in tanks, sumps and other liquid carrying vessels.

Sight Glass / Features:
  • Compact and very safe in application.
  • Range of glass configurations to assist visibility under most varied conditions of service, including: flat glass, domed glass and circular internal reflex corrugations.
  • Internal metal reflector further assists vision.
  • Elastomeric seals ensure good operating range of mediums and temperature.
Benefits: Very compact and unobtrusive visual level check, to serve on its own or as back-up for other level control and monitoring systems. Easy to install or remove for cleaning and maintenance.

Product Applications: Presence of liquid indicator in tanks, sumps and other liquid carrying vessels/recipients.


Data Sheet

Product Page

For more varieties and information on the Seetru sight glasses range, please contact us or send an email to
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