L.J. Star Incorporated Datasheets for Sight Windows

Sight windows are an effective and economical way of viewing tank, pressure vessel and piping systems interiors. They are also referred to as sight glasses.
Sight Windows: Learn more

Product Name Notes
Butt-Weld Sight Glass A combination of easy cleaning and a clear field of visibility is provided by this specially constructed sight glass unit. With a butt-weld connection, these Series-MV sight glasses allow the...
Replacement Sight Glass Disc Borosilicate Glass to DIN 7080 with temperature ratings to 536°F (280°C)Quartz Glass with temperature ratings to 1000°F (537°C) Glass discs with wiper hole and Obround and gauge glass also available.
Optical Grade Polymer Windows -- MetaPlex® Extremely strong and chemically resistant to acids, alkalis (caustics) and alcohols, the MetaPlex® optical grade polymer windows are encapsulated in a stainless steel frame for use in sanitary processing...
Asceptic Sight Glass Window For aseptic and sanitary applications, the new flush-mounted NA connect sight glass from L.J. Star Incorporated provides clear process visibility and unmatched safety with minimal maintenance requirements. The NA connect...
Fused Sight Glass Assembly Mechanically pre-stressed sight glasses are now available with glass coated metal, allowing no metal exposed to the product. Constructed of glass fused with a dimensionally adapted glass coated metal frame-ring,...
Sight Glass Disc with Wiper, Type 73 SW -- Metaglas® Metaglas is the strongest sight glass available. Mounting: Weld-on DIN28120 or similar assembly Glass: Borosilicate to DIN7080 Metal: Carbon, Stainless Steel or Hastelloy Up to 572° F Up to 900...
Industrial Bolt-On Sight Glass Our sight glass is ready for installation on existing ANSI or DIN standard flanges. This bolt-on sight glass unit consists of a base with a raised face flange to fit...
Hi-Pressure Weld-On Sight Glass -- Lumiglas® Sight Glass available in six standard sizes that provide viewing areas ranging in size from approximately 3? to 9? in diameter. The weld-on assembly is designed to provide direct visual...
Sight Glass Disc, Type 73 -- Metaglas® Sight glass disc for DIN28120 and other weld-type sight glass assemblies. Mounting: Weld-on DIN28120 or similar assembly Glass: Borosilicate to DIN7080 Metal: Carbon, stainless steel or Hastelloy Up to 572°
Hinged Sight Glass -- Lumiglas® View/Light Combo Series SKS SKS/ESKS integral light/sight glass units have a quick release closure, so that they are a combination of charge/access port and light/sight glass. The integrated luminaire illuminates the internal of boilers,...
Heated Sight Glass MetaClamp® for Fog-Free Viewing The popular Metaclamp® is now available with a fog/condensate free option. A built in heater keeps the temperature of the sight glass above the point where condensation and fog can...
Gauge Glass -- MAXOS® The same commitment to quality the L.J. Star name is known for is now available to you for all your replacement gauge glass and accessories! L.J. Star replacement borosilicate gauge...
Sanitary Sight Glass Window -- MetaClamp® The strongest, most secure sight glass elements available, Metaglas® mechanically prestressed windows, are available in a sanitary design for process applications. Unlike some other sight glasses, Metaglas sight glasses meet...
Industrial Threaded Sight Glass Window -- Metaglas® The strongest, most secure sight glass elements available, Metaglas® mechanically prestressed windows, are available in a threaded design for process applications. Metaglas threaded sight glasses are compliant with the recently...
Low Pressure Weld-On Sight Glass -- Lumiglas® These weld-type sight glass fittings, complete with glass disc, seal gasket, and cushion gasket bolted between circular flanges, is the low-pressure version of the DIN 28120. The units can be...
Bolt-on Sight Glasses to ANSI B16.5 Type 13 -- Metaglas® This sight glass features a flat face ANSI mating flange. It’s special design offers reliability against rupture, a long working life, and a smooth, easy to clean surface. It meets...
Obround Sight Glass Welded into a vessel or a pipeline, these rugged fittings provide either flow or level indication. They are available in carbon steel, stainless steel and special alloys. Obround visible glass...
Rectangular Level Gauge Welded into a vessel or a pipeline, these rugged sight glass fittings provide either flow or level indication. They are available in carbon steel, stainless steel and special alloys. Rectangular...
Sanitary Hinged Sight Glass -- Metaglas® Sanitary MetaClamp® When a quick-opening port is required in a process application, this sanitary hinged sight glass, which incorporates the use of the MetaClamp®, can be used for applications with pressures up...
Hinged Sight Glass -- Metaglas® When a quick-opening sight glass is required in a process application, this hinged assembly, which incorporates the use of Metaglas, can be used up to 150 psi, depending on size.