Lumistar Luminaire USL08LED-Ex-UL

Lumistar Luminaire USL08LED-Ex, UL-listed + T6


  • UL-listed
  • Temperature class T6 at a Ambient temperature up to 50°C
  • Extended voltage range (120 – 240 V AC)
  • Subsequent change of the radiation angle possible
    (15°, 25°, 35°)
  • LED technology with more efficient light output
    compared to the halogen version
  • Can be exchanged for the old halogen version 1:1, as the housing and the fixings have not changed on the outside

The Lumistar USL08 with UL/cUL Ex-listed is now also available in LED technology and can be are manufactured and sold. The approval includes the following technical details:

Voltage range: 120-240V
Approved for: − Class I Div. 1 and 2, Groups C and D, temperature class T6 at max. ambient temperature 50°C
− Class I Div. 2 Groups A, B, C, D, temperature class T2

There are two versions with different radiation angles and light colours:

Version 1:

  • Lumistar USL08LED-Ex with LED chip. (COB Version à Chip on Board)
  • Light output max. 2200 lumen
  • With this version, a subsequent lens change by the customer is possible. (possible radiation angles 15°,25°,35°)

Part no :
LS#3542.501.00 incl. 15° lens
LS#3542.502.00 incl. 25° lens
LS#3542.503.00 incl. 35° lens
Version 2:
Lumistar USL08LED-Ex with the 7-gang LED card from the Lumistar luminaires USL07LED or ESL/ ASL55 LED
Light output max. 1600 lumen (for applications where too high light output can cause glare,  e.g : (small boilers)
Part no :
LS#3542.504.00 incl. 11° lens
LS#3542.505.00 incl. 26° lens
Available: immediately
Delivery time: 2-3 weeks
Price (net): Euro 725,00
Attachment: Data Sheet

Lumistar Luminaire USL 13, stainless steel

Luminaires (Non-Ex)

Lumistar luminaires stainless steel USL 13 and USL 33 and UL-listed types

  • USL 13: for general applications, mounted with hinged bracket
  • USL 33: special variant for sterile environments with adapter collar for fitting over flanges, etc.
Product Picture: Lumistar Luminaire USL 13, stainless steel

Also available in LED technology

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

This sight glass luminaire is designed for universal applications. It is ideal for use in combined sight and light ports (single-flange version) or for two separate ports (2-flange version).

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.

Suits all Lumiglas Sight Glass Fittings from size DN 25 Operating voltage/power: 12V, 24V, 120V / 20W, 50W
Secured by hinged bracket

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

Max. admissible ambient temperature at the cable entry gland with  Halogen version: 90°C; with LED version: 40°C

  • USL 13: The luminaire is attached to the cover flange of the circular sight glass fitting or the visual flow indicator with a hinged bracket, or fastened to the grooved nut on screw-type sight glass fittings. 
  • USL 33: The luminaire is mounted over an adapter collar.


Lumiglas® Luminaires

Luminaires illuminate process vessel interiors in pharmaceutical, food processing, and chemical plants.

Choose from standard Luminaires (Non-Ex) and explosion-proof Luminaires (Ex) housings as well as halogen or LED designs.

Some applications require safe, high-intensity illumination for sight glasses, ports, or general applications in hazardous (classified) locations.

Lumiglas luminaires are available with aluminum or stainless steel construction and, depending on the size and wattage, can be equipped with momentary push button switches for safety and longevity. Remote or pneumatic timers and pushbutton switches are also available as Lumiglas light accessories. A new series of  Lumiglas LED Luminaires is now available.

In short, the luminaire is the entire device and the lamp is the specific replaceable component that produces light.

“A lamp is a light source that is placed in a luminaire!”

light fixture (US English), light fitting (UK English), or luminaire is an electrical device used to create artificial light by use of an electric lamp. All light fixtures have a fixture body and a light socket to hold the lamp and allow for its replacement.

Sight Glass Lights

There are many considerations for selecting the optimum light to illuminate your process vessel. This online guide walks you through the steps.

Dedicated or Separate Light Port

Often process vessels have two sight glass windows: one port for viewing and a separate port for the light. The light is typically mounted directly over the light port. To save cost or space, some vessels combine light and sight at one window. The light is typically mounted with a bracket, although sight glasses are available with integrated lights (combo style). 

LED or Halogen

Traditional halogen lights use trusted incandescent light bulbs. LED lights offer brighter light, lower energy consumption, and longer life (lower maintenance costs.) Halogen light brightness is selected by wattage: 5 to 100 Watts, with 50 Watts typical. LED light brightness is selected by lumens: 1000 to 3000 lumens.

Explosion Proof or Non-Explosion Proof

Some industrial environments require explosion proof lights (ex lights) that are sealed so they cannot introduce a spark into the atmosphere. The widest selection of ex lights are halogen style, although explosion proof LED lights are also available.

Stainless Steel or Aluminum Housing

Virtually all sight glass lights use stainless steel housings. A few ex light models are available with aluminum housing, lowering their cost while removing heat more efficiently.

Available Power Supply

Most lights are available in a range of voltage options. Make sure that the model you select will work with the power you have available: 120 VAC, 24 VDC/VAC, 230 VAC, 12 VDC/VAC.
When deciding upon a proper luminaire for your application, be sure to consider all of the properties of the light. The size, weight, voltage, wattage, materials of construction, mounting configuration, and light pattern (Lux diagram) are all very important factors you should be aware of.