USL03-LED Sight Glass Luminaire – Technical Specifications


Product Overview: USL03-LED Sight Glass Luminaire

The USL03-LED is a specialized, ultra-compact sight glass luminaire engineered for critical interior illumination of bioreactors, laboratory mixers, filters, tanks, and pipelines. Featuring a robust stainless steel housing, this unit delivers high-intensity, glare-free illumination specifically optimized for visual flow indicators and closed vessels in non-explosive operating environments.

🛡️ Optimized for Sanitary & Hygienic Applications

Unlike standard industrial lighting solutions, the USL03-LED is built with a hygienic design philosophy. Its crevice-free stainless steel construction meets the strict cleanliness and sterility standards required by the Food & Beverage, Pharmaceutical, and Chemical industries.

Technical Specifications

Engineered for durability and performance, the USL03-LED combines compact dimensions with powerful LED technology.

Model Type Lumiglas USL03-LED
Housing Material High-grade Stainless Steel (Body: 1.4301 / Head: 1.4552)
Ingress Protection (IP Rating) IP65 (Dust-tight; protected against water jets per EN 60529)
Mounting Compatibility • Circular sight glass fittings: DIN 28120 / DIN 28121
• Screwed sight glass fittings: DIN 11851 (Sanitary)
• Visual flow indicators
Nominal Sizes Compatible with DN 25 up to DN 150 (depending on fitting type)
Light Source High-efficiency LED
Color Temperature 5700K (Daylight White) for neutral color rendering
Beam Angle Options 18° Spot: For deep penetration and concentrated light
30° Flood: For broader area illumination
Operating Voltage 24V AC/DC (Standard) or 12V options available

Frequently Asked Questions (Technical FAQ)

Can the USL03-LED be used in washdown environments?

Yes. With a verified IP65 protection class, the USL03-LED is fully sealed against dust ingress and is protected against low-pressure water jets from any direction. This makes it safe for standard industrial cleaning processes and washdowns common in food and chemical processing plants.

What specific fittings does the USL03-LED fit?

The unit is designed for universal versatility on both combined sight/light ports (single-flange) and separate ports. It specifically fits:

  • DIN 28120: From nominal size DN 25 and larger.
  • DIN 11851: From nominal size DN 65 and larger.
  • Visual flow indicators and similar pipeline components.
Why is stainless steel 1.4552 used in construction?

The 1.4552 grade is a high-performance stainless steel often used in glass-to-metal sealing applications. Its inclusion ensures the structural integrity and corrosion resistance required for long-term operation in demanding industrial atmospheres.

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