What are the Effects of Undiffused and Diffused Light on Stainless Steel?

Luminaire product from LJ StarUndiffused light can reveal a large number of surface imperfections in stainless steel products that diffused light does not. By analyzing these differences, diffused light has been found to have less variability in the intensity of reflected light, making it ideal for sight-based applications. If you’re using a sight glass to monitor your tanks or systems, you’re going to want to work with diffused light.

The Top 5 Questions to Ask Regarding Sight Glass Lighting

Since the interior of your vessels and pipelines are often too dark for you to see through a sight glass, exterior lighting must be used to illuminate the important stages of your systems. Typical flashlights aren’t powerful enough and often create distracting glares on the sight glass. That’s why mounting lights, or luminaires, must be affixed to your equipment if you want to accurately look through a sight glass and monitor your systems.

What’s The Best Type of Lighting For My Sight Glass?

Mounting lights, or “luminaires”, are required in most sight glass applications in order for operators to be able to accurately see what’s going on inside a vessel or pipeline. Where flashlights and other commercial lighting solutions fail, industry-grade mounted lights can provide direct, high-powered illumination that can light up even the darkest environments.  

MetaClamp® LED Ring Light Series SGL

The new MetaClamp® LED Ring Light Series SGL is a powerful yet compact illumination system for sanitary processing equipment providing illumination and viewing through the same window.

This unique combination sight/light glass incorporates the L.J. Star MetaClamp® system with METAGLAS® safety windows. They can be used to view the interior of either new or existing sanitary processing equipment.

Unlike other solutions that used separate viewing and fiber optic light assemblies, this innovative and compact design mounts directly onto sanitary ferrules for use in combined sight and light ports (single port). The design is both less expensive and more durable for industrial settings, since it uses fewer sub-assembly components.

METAGLAS® safety windows with the MetaClamp® sanitary connection provide the strongest, most secure sanitary viewing option available. Essentially immune to catastrophic failure, these windows are comprised of stainless steel and borosilicate glass, fused together to create a window so uniformly compressed it tolerates both extreme pressure and temperature, serving reliably for years in applications where conventional soda lime or BoroPlus windows fail repeatedly.

Three sizes of the SGL Light attach directly to either a 2-1/2”, 3”, 4”, 6” or 8” MetaClamp® view port, which eliminates separate mounting of the light source. The polished housing is made of 316 stainless steel, which carries NEMA 4X and IP68 ratings.


Key Applications:

Pharmaceutical, biotech, brewery and food processing industries. Used for illuminating bioreactors, mixers, brew kettles, filters and the interior of tanks, hoppers, silos, agitators, separators, pipelines and other, usually closed, containers in non-hazardous areas.

Product Specifications:

SGL LED Technology:

  • Ultra-bright LEDs provide up to 399 lumens, equal to a typical 80-Watt halogen light
  • Capable of continuous operation
  • Cool white, 5000K color temperature, optimized for stainless steel vessels
  • LEDs have long service life and are vibration and impact resistant
  • No heat radiation into process vessel (cold light output)

Protection & Operating Conditions:

    • Dust and waterjet tight to NEMA 4 & 4X and IP68
    • Approved for use in ambient temperatures from 0°C up to +50°C at the cable entry gland.

Electrical Data:

Operating voltage is 24VDC (+-10%) with continuous current of 10mA. The light is equipped with a 4-pin M8 connector and supplied with a 10-meter power cable (other lengths available). Cable also available with compact 3-minute timer and switch.

Electropolishing available.

What is Explosion-Proof Process Lighting?

Explosion-Proof Process Light
Explosion-proof process lighting solutions for industrial applications allow illumination in hazardous facility areas. Also referred to as EX lights, explosion-proof lights are suitable for illuminating processes in hazardous locations where combustible gases or vapors may be present, such as a critical processing line, pipeline, or a vessel.

L.J. Star Sheds Light on a Common Issue for Breweries

Beer is one of the oldest and the most largely consumed alcoholic beverages in the world.  This all-time favorite brew has been a staple at sporting events, social gatherings, and family barbecues for generations.  During the past few years, craft beers have created quite a buzz among younger consumers seeking a more unique palette than their parents’ traditional beer.  Craft breweries have experienced unprecedented growth by bringing an almost endless variety of beer styles to the market.  In fact, the overall global beer market is expected to reach $685 billion by 2025.

Will My Sight Glass Corrode?

Will My Sight Glass Corrode?

While inherently resistant to corrosion, sight glasses can begin to corrode under the right circumstances, particularly if the wrong material is spec’d for the application. If a sight glass happens to corrode, it becomes increasingly vulnerable to sight glass failure. When glass fails, it is often sudden and catastrophic, damaging your system, putting workers at risk, and causing unplanned downtime. That’s why it’s important to understand the dangers of sight glass corrosion and failure so that you can adequately prepare for them… and avoid a costly disaster.