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USL 13 LED Sight Glass Luminaire
The USL 13 LED Sight Glass Luminaire is a compact stainless steel LED light designed for illuminating reactors, tanks, visual flow indicators, and process vessels. Its glare-free illumination, IP65 protection, and energy-efficient LED technology provide reliable process observation in non-hazardous industrial environments.
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Technical data
USL 13 LED Sight Glass Light Overview
The USL 13 LED Sight Glass Luminaire is a compact industrial lighting solution engineered for illuminating sight glasses, visual flow indicators, and enclosed process equipment. Its all-stainless-steel construction, high-efficiency LED module, and space-saving design make it ideal for applications where installation space is limited.
Designed for non-hazardous environments, the USL 13 LED delivers uniform, glare-free illumination while producing very little radiant heat. This allows operators to safely monitor mixing processes, liquid levels, filtration, product flow, and vessel conditions without affecting sensitive media.
The luminaire is suitable for circular sight glass fittings according to DIN 28120, DIN 28121, visual flow indicators, and screw-type fittings similar to DIN 11851 using optional flange collars. It is widely used in pharmaceutical production, biotechnology, food processing, laboratory equipment, chemical processing, and water treatment systems.
With an IP65-rated enclosure, corrosion-resistant stainless steel housing, and an LED lifetime of up to 50,000 hours, the USL 13 LED provides dependable long-term performance while minimizing maintenance costs.
USL 13 LED Ex Sight Glass Light — Technical Data
| Specification | Details |
|---|---|
| Product Name | USL 13 LED Sight Glass Luminaire |
| Light Source | High-Efficiency LED |
| Housing Material | Stainless Steel 1.4404 (SS316L) |
| Mounting Bracket | Stainless Steel 1.4301 |
| Lens Material | Borosilicate Glass |
| Application | Non-Hazardous Areas |
| Protection Rating | IP65 |
| Operating Voltage | 12V / 24V AC/DC |
| Rated Power | 3.5 W |
| Luminous Flux | Approximately 180 lm |
| Color Temperature | 4000 K |
| Beam Angle | 36° |
| LED Lifetime | Up to 50,000 Hours |
| Ambient Temperature | Up to 40°C |
| Cable Length | 3 m (standard) |
| Compatible Standards | DIN 28120, DIN 28121, DIN 11851, Visual Flow Indicators |
Dimensions and electrical data for Lumistar luminaire USL13 LED-Ex:
• Connection data (further versions on request):
| Item | Type USL 13/33-LED | Nominal Voltage V | Pushbutton | LED | Socket | Part. no. USL 13-LED | Part. no. USL 33-LED |
|---|---|---|---|---|---|---|---|
| 1 | (24 V) 3.5 W | 24 ≈ | with | 12 V 2,5 W | GU4 | 3541.414.00 | 3541.416.00 |
| 2 | (24 V) 3.5 W | 24 ≈ | without | 12 V 2,5 W | GU4 | 3541.415.00 | 3541.417.00 |
| 3 | (24 V) 3.5 W | 24 ≈ | with switch | 12 V 2,5 W | GU4 | 3541.410.00 | 3541.412.00 |
| 4 | (12 V) 2,5 W | 12 ≈ | without | 12 V 2,5 W | GU4 | 3541.422.00 | ./. |
| 5 | (12 V) 2,5 W | 12 ≈ | with | 12 V 2,5 W | GU4 | ./. | 3541.424.00 |
KEY FEATURES
Compact Stainless Steel Design
Ideal for confined installation spaces.
High-Efficiency LED
Bright illumination with low energy consumption.
IP65 Protection
Resistant to dust and water jets.c
Long Service Life
LED lifespan up to 50,000 hours reduces maintenance frequency.
Cold Light Technology
Minimizes heat transfer to the process.
Compatible Mounting System
Designed for DIN 28120 / DIN 28121 sight glass fittings.
TYPICAL APPLICATIONS
- Pressure Vessels
- Chemical Reactors
- Boilers & Steam Systems
- Pipeline Sight Glass Assemblies
- Pharmaceutical Equipment
- Food & Beverage Processing
- Industrial Observation Ports
FAQ
A:The USL 13 LED is designed to illuminate sight glasses, visual flow indicators, laboratory vessels, reactors, and tanks, providing clear visibility for process monitoring in non-hazardous environments.
A:It is compatible with DIN 28120, DIN 28121, visual flow indicators from DN25, and screw-type sight glass fittings similar to DIN 11851 using an optional flange collar.
A:LED cold light produces minimal heat, making it safe for temperature-sensitive processes such as chemical reactions, fermentation, and sterile production.
A: It is compatible with DIN 28120, DIN 28121, and DIN 11851 sight glass fittings and similar industrial connections.
A:The LED module offers an operating life of up to 50,000 hours, reducing maintenance frequency and replacement costs.
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