Lumistar Luminaire USL 33 and USL 35, stainless steel

Luminaires (Non-Ex)

Product Picture: Lumistar Luminaire USL 33 and USL 35, stainless steel

Also available in LED technology

Fully Sealed Lumistar Sight Glass Luminaire with cover glass, compact, all stainless steel

Suits for sanitary sight glass fittings with METAGLASS in Bio-Control or NA-Connect fittings

Operating voltage/power:
12 V, 24 V, 120 V, 230 V / 20 W, 50 W, 100 W


Lumistar Luminaire USL 15-LED and USL 35-LED, stainless steel

Luminaires (Non-Ex)

Lumistar luminaires USL 15 and USL 35 and UL-  Listed types, stainless steel

Product Picture: Lumistar Luminaire USL 15-LED and USL 35-LED, stainless steel


This sight glass luminaire is designed for universal applications.

Application in chemical, pharmaceutical, biogas and food processing  Industries:

It is ideal for illuminating bioreactors, laboratory mixers and filters as well as the interiors of tanks, agitators, separators, pipelines and other, usually closed, vessels in non-explosive operating environments.

It is ideal for use in combined sight and light ports (single-flange version) or with two separate ports (2-flange version).

Compact design, powerful light output:

Glare-free illumination; suitable for circular sight glass fittings to DIN  28120/DIN 28121 or similar, for screw-type sight glass fittings in compliance with DIN 11851, and for METAGLAS® and BioControl fittings.

Protection class: Dust- and waterjet proof, IP 65 according to EN 60 529 / DIN VDE 0470, Part 1

Voltage type: AC/DC
Operating voltage: 12  V, 24  V, 120  V, 230  V
Wattage: up to 100 W, depending on operating voltage

Transformers: Transformers for 12 V or 24 V secondary voltage can be supplied on request.

Push-button:  Luminaires with a wattage of 50 W and more should only be operated by push-button (not in continuous mode). Should an integrated push-button not be included in the order/ scope of supply, it is essential for an external momentary-contact push-button or a timer to be installed in the power supply line, outside the luminaire! Under no circumstances should the maximum temperatures specified for the luminaire be exceeded.

Mounting Options:
Secure to sightport flange with stainless steel bracket or mount directly to a Sanitary (e.g. Tri-Clamp® ferrule or NA-Connect® ) fitting for sterile  applications.


  • Insensitive to vibration
  • No heat radiation in the light port (cold light)
  • No additional heat which would be undesirable for chemical and/or biological processes
  • Extreme high-contrast lighting


  •  Fit & Forget – Extremely long operating life and reliability
  • Durability – Impact & Vibration resistant
  • No heat radiation from lens -Will not heat product in vessel
  • Low energy consumption – Requires only 15 watts