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!

  • Durable

    Sight Glass
    • 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

    Sight Glass
    • 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

    Sight Glass
    • 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
  • Thread Size NPT BSPP
    1.0" Available Available
    0.25" Available Available
    0.375" Available Available
    0.5" Available Available
    0.75" Available Available
    1.25" Planned N/A
    1.5" Planned N/A
    2.0" Planned N/A
    Thread Size Metric
    M10x1.0 2016
    M10x1.5 2016
    M12x1.5 2016
    M16x1.5 2016
    M20x1.5 2016
    M22x1.5 2016
    M30x1.5 Planned
    M30x2.0 Planned
    M33x1.5 Planned
    M33x2.0 Planned
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  • Install in 5 Easy Steps

    1. Apply thread sealer to the threads before installation.
    2. Hand-thread the Luneta Sight Glass into the port.
    3. Use a crescent wrench or 1-5/16” socket wrench to tighten until the hex nut contacts the port face (or if applicable, until the O-ring is compressed).
    4. Check for leaks and apply more thread sealer if necessary.
    5. Do not overtighten.
    Sight Glass 1" 0.75" 0.5" 0.375" 0.25"
    Wrench 1-5/16 1-1/8 7/8 3/4 5/8
    Recommended Temp. Range Max. Operating Pressure
    -40°F to 200°F / -40°C to 93°C 65 psi/4.48 bar

Comparison Luneta Sight Glass Acrylic Sight Glass
Impact Resistance (Joules) >40 8.9
Toughness or Durability (Notched Izod, 23-deg C, J/cm) 9.8 0.2
Wall Thickness (Thinner = Clearer) 0.19" 0.25"
Chemical Resistance Excellent Poor

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