The Sight Glass - LUNETA
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The Sight Glass
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The Sight Glass

Detect Lubricant Problems Fast

Luneta’s new Sight Glass has all the clarity and durability you need, with none of the leaks, cracks or squinting you may be used to with those old-style sight glasses. You’ll never have to use fragile, dark, hard-to-read sight glasses again!



  • One-piece, high-impact Tritan™ construction makes it the toughest site glass available
  • Resistant to chemical wear and buildup
  • Integrated threads means no leaking between sightglass and machine port



  • The Sight Glass extends from the machine, providing a clear view of oil
  • Molded-in hex nut means a quick, simple installation
  • Integrated eyelet for attaching lubricant ID tags or other pertinent information speeds up visual inspection and prevents confusion



  • Tritan™ construction means the Sight Glass is ultra-thin & super-clear with no distortion/discoloration
  • Etched, painted cross-hairs won’t fade, rub off or distort the perceived oil level
  • Flat front surface allows for use of light or lasers to check for particulate – with no light deflection


ComparisonLuneta Sight GlassAcrylic Sight Glass
Impact Resistance (Joules)>408.9
Toughness or Durability (Notched Izod, 23-deg C, J/cm)9.80.2
Wall Thickness (Thinner = Clearer)0.19″0.25″
Chemical ResistanceExcellentPoor

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