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L.J. Star Sight Flow Indicator Offers Reliable View of Processes in a Variety of Fluid Applications

Borosilicate sightglass increases flow indicator’s
safety and durability in high-pressure conditions


Twinsburg, Ohio – April 5, 2012 – L.J. Star announced its Standard Visual Flow Indicator, a product that allows for an easy, detailed observation of processes in harsh fluid applications characterized by high pressure, high temperatures and high corrosion. Designed to enhance safety and simplify maintenance, this type of flow indicator has two opposing sight ports allowing an operator to view the intervening flow of fluid lighted from behind by ambient light or a mounted light source.

The flow indicator is available in a variety of sizes, ranging from ˝ to 12 inches, and is full-ANSI rated. All are available with indicators such as rotors, flappers and drip tubes.  The highly durable sightglass is made from tempered borosilicate glass, a material that wears very well under pressure, caustics and high temperature. This product may be requested in stainless, carbon or Teflon lined, and includes independently-bolted glass retainers.

Reliable and low-cost, this flow indicator enables the observation of the direction and rate of flow of liquid, powder or gas through pipelines. It also allows operators to observe the color and clarity of process fluids through the viewing window.
L.J. Star’s Standard Visual Flow Indicator is available in flanged or threaded connections, both of which are ANSI-designed for 150 psi or 300 psi. The flow indicator may be ordered in a wide range of styles engineered to accommodate various mounting positions, fluid characteristics and flow rates. All L.J. Star flow indicators meet or exceed pressure and temperature ratings, which vary depending upon the sightglass design.
To learn more about L.J. Star’s flow indicator products, visit:

About L.J. Star
L.J. Star Incorporated provides an extensive line of process observation equipment -- sightglasses, lights, sanitary fittings, and level gage instrumentation. Product lines include Metaglas® Safety Sight Windows, Lumiglas® Explosion Proof Lights and Cameras, Visual Flow Indicators, Sight Ports, Sanitary Clamps, Magnetic Level Gages and Gage Glass.  Metaglas is the #1 selling fused sightglass, proven in thousands of installations around the world. Unlike some other sightglasses, it meets stringent DIN 7079 and DIN 7080 quality standards, and it is approved for USP Type I use. For additional information, or to request third-party documentation of standards compliance and product performance claims, contact L.J. Star Incorporated, P.O. Box 1116, Twinsburg, OH 44087. Phone: 330-405-3040. Fax: 330-405-3070. Email: Website:

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 Sight Glass Products
 Flow Indicator
 Borosilicate Glass
 Visual Flow Indicators

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