USL 33 LED luminaire — stainless-steel sight-glass light
USL 33 LED luminaire — compact stainless-steel sight-glass light. IP65 protection, 12/24 V LED, 180 lm, easy hinged-bracket mounting for DN25+ fittings.
Description
The USL 33 LED luminaire is a compact stainless-steel sight-glass light designed for mounting on sight glass fittings and visual flow indicators. It delivers glare-free LED illumination, easy hinged-bracket mounting and hygienic stainless finish — ideal for lab mixers, bioreactors, tanks and process vessels. (Source: official datasheet).
What makes the USL 33 LED stand out?
- Compact, versatile mounting: hinged bracket for circular fittings or grooved-nut fastening for screw-type fittings. Fits DN25/DN40 and flow indicators from DN25+.
- Process-safe LED: low heat into the process, 12/24 V options, ~180 lm luminous flux — excellent for inspection without heating sensitive products.
- Robust protection: IP65 dust & water-jet protection; factory fitted cable, other lengths on request.
- Hygienic stainless finish: body & cover in stainless steel; light choice suitable for food, pharma & lab applications.
Quick technical specifications
| Parameter | Value / Notes |
|---|---|
| Product | USL 33 LED luminaire (Lumistar / Lumiglas) |
| Operating voltage | 12 V / 24 V AC/DC (LED variants). Transformers or 230→24 V power supplies available on request. |
| Luminous flux | ≈ 180 lm (LED). Colour temperature ≈ 4000 K. Reflected beam angle ≈ 36°. |
| Mounting compatibility |
|
| Protection class | IP65 (EN 60529). Max admissible ambient at cable entry gland for LED version: 40°C. |
| Materials / Cable / Weight | Body & cover: stainless steel 1.4404; Mounting parts (hinge, flange collar): stainless steel 1.4301; Cable: factory-fitted 3 m (3 × 0.75 mm²) standard; Weight: ≈ 0.58 kg. |
| Variants & accessories | USL 33-LED (sterile / adapter-collar variant). Flange collars DN50 / DN65 available as accessories. Part numbers and options: see datasheet. |
Datasheet: Download USL 33-LED datasheet (PDF)
Request quote / CAD
Typical applications
- Process inspection ports, sight-glass and flow indicators
- Bioreactors, laboratory mixers and filtration vessels
- Food, pharmaceutical and chemical processing lines
Installation & maintenance (short)
- Mount with supplied hinged bracket on the mating flange, or use grooved-nut mounting for screw-type fittings.
- Check cable gland and ambient limits; LED versions typically have 40°C limit at cable entry.
- Disconnect power before servicing. Do not look into the light source — risk of eye damage.
FAQ
- Q: What sizes does USL 33 fit?
- A: Circular sight glass DN25 (DIN 28120) and DN40 (DIN 28121); flow indicators from DN25; screw-type fittings from DN50 (adapter may be required).
- Q: What is the cable length?
- A: Factory-fitted 3 m cable (3 × 0.75 mm²) standard; other lengths available on request.
© Lumistar.
