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3D Sight Glass 1/4" BSPP

Luneta 3D Sight Glass 1/4 inch BSPP

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$44.67  Cart is in US Dollar

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.

Brand: Luneta
Part Number:


High-Definition View

Compared to other bullseye sight glasses, the Luneta Sight Glass provides a crystal-clear, undistorted view of in-service oils. You'll notice the difference immediately . This level of clarity is achieved by our manufacturing process and the use of Tritan, which allows for much thinner outer walls than acrylic sight glasses.

Heavy-Duty Durability

The Luneta Sight Glass is 4x stronger than traditional acrylic sight glasses, shatterproof and chemically resistant. In fact, it's made with a proprietary copolyester that is stronger than bulletproof glass. The Luneta Sight Glass can take a beating and withstand harsh environments, including extreme temperatures.


  • Impact Resistance (Joules): >40
  • Toughness or Durability (Notched Izod, 23-deg C, J/cm): 9.8
  • Wall Thickness (Thinner = Clearer): 0.19"
  • Chemical Resistance: Excellent Size: 1/4" BSPP


  • Durable
  • 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
  • Convenient
  • 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
  • Precise
  • 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