Lumistar Luminaire ESL 53-LED, stainless steel

Luminaires (Non-Ex)

Product Picture: Lumistar Luminaire ESL 53-LED, stainless steel

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

Applications in the chemicals, pharmaceutical, biogas and food processing industries:

For illuminating the interior of vessels, tanks, agitators, silos and other generally closed containers and reactors and also in visual flow indicators in non-explosive environments.

Compact design, powerful light output:

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

Protection class: dust-tight and water jet-proof, IP 65 acc. to EN 60 529 / DIN VDE 0470 part 1

Voltage type: AC/DC
Operating voltage: 24 V AC/DC
Output: 7 W

Transformers for 230 V AC / 24 V AC are available
on request

ESL 53-LED-KS: for general use with hinged bracket
ESL 53-LED-B: special sterile version for flange attachment for fitting over flanges, collars, etc.


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


Lumistar Luminaire ASL 55-LED, aluminium

Luminaires (Non-Ex)

Product Picture: Lumistar Luminaire ASL 55-LED, aluminium

Lumistar Luminaires ASL 55-LED (aluminium) and ESL 55-LED (stainless steel)

Sight glass luminaire for universal applications; ideally suited for sight glass and light port combinations (single-flange version) and for separate  configurations (double-flange version).


The optimum solution in the pharmaceutical and food processing industries, ideal for illuminating bioreactors, laboratory mixers and filters as well as the interiors of boilers, tanks, agitators, separators, pipes and other – usually sealed – vessels in operating environments that are not potentially explosive.

The specific advantages of Lumiglas LED technology:

  • Insensitive to vibration
  • Long service life and high operational reliability
  • Continuous operation for LED up to about 50,000 hours
  • The ideal solution wherever fittings are difficult to access
  • 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

Compact yet powerful:

Dazzle-free illumination; suitable for use with circular sight glass fittings to DIN28120/DIN28121 or similar, with screw-type sight glass fittings in compliance with DIN 11851, and in sight flow indicators.

Type of protection: Dust-tight and waterjet-proof, IP 65 acc. to EN 60529/
DIN VDE 0470, Part 1

Electrical data:

Convenient electrical link-up: The Lumistar luminaire is equipped with a factory-mounted screwed cable gland.

The Lumistar luminaire ASL-/ESL 55-LED is compatible with the following nominal diameters:
a) Circular sight glass fitting acc. to DIN 28120: DN 40
b) Circular sight glass fitting acc. to DIN 38121: DN 40
c) Sight glasses in flow indicators: DN 50
d) Screw-type sight glass fittings similar to DIN 11851:
DN 50 is mounted by way of a separate flange attachment
– From DN 80 up, the unit is secured using the hinged bracket

Lumistar luminaires ASL 55-LED and ESL 55-LED have a special adapter in the light port as a standard feature, making this type of lamp ideal for applications in aseptic and sterile environments. Excellent results are assured by using sight glasses fused to a metal frame (METAGLAS®) and with the BioControl (NEUMO) range of products. METAGLAS® combines optimally with clamp fittings (METACLAMP®) as well as with NA-ConnectTM technology.



Lumiglas – the observation of process operations taking place 

inside pressure and vacuum vessels, tanks, reactors, silo units, filters and other plant demands perfect illumination and unhindered visual check. 

that is what lumiglas offers.

Lumiglas stands for sight and light ; for ideal visual control.

These inspections are carried out either by the process operative directly on the spot or without the need to access the plant, by means of the Lumiglas VISULEX Ex camera system. The combination of light and sight glass, created by Papenmeier- the first of many Lumiglas patents- is the ideal low cost solution for the user: the additional cut-out for a second sight port in the case of separate ports is avoided.

More security- less cost!

Lumiglas is internationally renowned and used by leading companies worldwide, particularly in explosion hazardous areas of the chemical, bio and pharmaceutical industries: mineral oil refining as well as foodstuffs and beverage industries, nucleur power plant, machine construction, electro industry, water treatment and shipbuilding.

Lumiglas means: 

Individually tailored resolution of problems; using economically attractive standard products or special designs to clients’ own specification. 

A closely woven network of agencies both in and out of the country ensures efficient customer and after sales service.

Lumiglas ensures that:

All products pass the tests laid down by DIN EN ISO 9001 and in accordance with EC guideline with new Dekra/Exam according to the ATEX Directive 2014/34 / EU for Ex certificated undertakings, a mandatory examination. Thus Lumiglas safeguards the quality that brings years of practical use.


Parallel to our core competencies, we have established a comprehensive integrated quality management system that is constantly evolving with growing demands.

This is the basis of our success. Our standard is improved day by careful quality planning of development   on the production, the   Sales   to service. Only in this way our products reach the required high reliability, availability and durability – even under difficult conditions. All those participating in the process be integrated into the overarching activities with.


Click to view the TÜV certificate (PDF)

Dekra/Exam according to the ATEX Directive 2014/34 / EU
Click to view the ATEX certificate (PDF)

UL ZPVI2 zertifiziert
Click to view the UP ZPVI2 certificate (PDF)




Bundesfachverband Elektronische Hilfsmittel für Behinderte e.V.

Fachverband Biogas e.V.

Quality and Service – clearly better

Lumiglas is orientated toward the future:

  • a patented idea with worldwide acceptance.
  • observation of process operations.
  • the economic way of providing a lighting and inspection port

Regulation (EG) No. 1935/2004

For materials and items intended to come into contact with food:

LED-Technology Worldwide

Our US agentL.J. Star Incorporated, introduced us to this clip available:

Now: each Luminaire available with Gost-R Certificate!

Lumiglas® is the global technology leader and number one for luminaires and camera systems in Ex and non-Ex areas.



  • Chemical and Pharma industry, Cosmetics
  • Petrochemical industry
  • Food industry
  • Breweries
  • Energy producers
  • Water utilities and Sewage treatment plants
  • Maritime
  • etc.

Explosion protection

As of July 2003, organizations in EU must follow the directives to protect employees from explosion risk in areas with an explosive atmosphere.

There are two ATEX directives (one for the manufacturer and one for the user of the equipment):

  • the ATEX 95 equipment directive 94/9/EC, Equipment and protective systems intended for use in potentially explosive atmospheres;
  • the ATEX 137 workplace directive 99/92/EC, Minimum requirements for improving the safety and health protection of workers potentially at risk from explosive atmospheres.

The ATEX 94/9/EU that is dedicated to the manufacturer has changed. Always applicable up to 19 April 2016 the ATEX 94/9/EC will be removed and replaced by a new directive.

This new ATEX directive was published on Saturday 29 March 2014, under the new reference : Directive 2014/34/EU of the European Parliament and of the Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to equipment and protective systems intended for use in potentially explosive atmospheres (recast) Text with EEA relevance – Official Journal of the European Union L 96 from 29/03/2014.

This new ATEX directive 2014/34/EU will be mandatory for manufacturer on 20 April 2016 as is stated in article 44 of the directive.

Promised for a long time, this new ATEX directive has been published together with 8 other directives in the frame of NEW LEGISLATIVE FRAMEWORK (NLF) ALIGNMENT PACKAGE (Implementation of the Goods Package). It was the subject of a “COMMUNICATION FROM THE COMMISSION TO THE EUROPEAN PARLIAMENT AND THE COUNCIL” for the Alignment of ten technical harmonisation directives to Decision No 768/2008/EC of the European Parliament and of the Council of 9 July 2008 on a common framework for the marketing of products, in Brussels, 21.11.2011 under reference COM(2011) 763 final.


Lumiglas process observation and visual control systems.


Lumiglas Tubular Sight Glass/Flow Indicator

Flanged at both ends DIN 2642 mating sizes PN 10 for fitting into pipelines

Length over flange: DIN 3202 F1

For visual control of state of fluid and flow in pipelines

Sizes from DN10 to DN200, also available with ANSI flanges
Stainless steel 1.4571(316Ti) flanges or other on request
Metal-(1.4301) or Plexi-glass outer shell for extra protection on request

Operating conditions:
Operating pressure: up to 6 bar, depending on wall thickness (higher ratings on request)

Operating temperature: up to 220°C

Materials of components referred to in adjoining exploded view (within data  sheet below):
Item Part Material
1 Connecting flange Stainless steel 1.4571 or other
2 Glass cylinder Borosilicate glass (DURAN)
3 Ring seals Silicon rubber or other
4 Spacer bars Stainless steel 1.4301 or other
5 Securing bolts A 2 or other
(with spring washer)

Special versions:
– with stainless steel or protective Plexiglas outer shell
– ANSI flanges
– customized length

– The flow indicator is bolted, using suitable gaskets, directly between the mating flanges of the pipeline.
– The flow indicator should be fitted so that no stresses (tensile, compression or torsional) are caused on tightening up.

Ordering information:
e. g. Lumiglas tubular sightglass/flow indicator DN 100, material 1.4571, borosilicate glass, 6 bar operating pressure,
length over flanges 350

product photo: Lumiglas Tubular Sight Glass/Flow Indicator