ESL55 LED-Ex luminaire — explosion-proof sight glass light
ESL55 LED-Ex luminaire — explosion-proof sight glass light, stainless steel, IP65/IP67, long-life LED (~50,000 h). For mounting on sight glass fittings: This sight glass luminaire is designed for universal applications and is ideal for use in combined sight and light ports (single-flange version) or with two separate ports (2-flange version)
Description
The ESL55 LED-Ex luminaire is an Ex-rated, stainless-steel sight glass luminaire engineered for hazardous areas (gas Zones 1/2 & dust Zones 21/22). It delivers glare-free, cold LED illumination with long service life and minimal heat load — ideal for bioreactors, flow indicators, and sight ports where safety and visual clarity matter.
Why choose the ESL55 LED-Ex?
- Explosion-proof certified: II 2G Ex db IIC T6 Gb and II 2D Ex tb IIIC T80°C Db — suitable for gas & dust hazardous zones.
- Long-life LED: high-power LEDs rated for up to ~50,000 hours; vibration-proof and low maintenance.
- IP65 / IP67 protection: robust dust and water protection for harsh process environments.
- Cold light: almost no heat into the process; safe for temperature-sensitive or sterile operations.
- Stainless steel, hygienic finish: polished 1.4404 housing and borosilicate lens for easy cleaning and corrosion resistance.
Quick technical summary
| Parameter | Value / Notes |
|---|---|
| Product | Lumiglas Lumistar ESL55LED-Ex sight glass luminaire |
| Ex ratings | Ex II 2G Ex db IIC T6 Gb
Ex II 2D Ex tb IIIC T80°C Db (Gas zones 1/2 and Dust 21/22) |
| LED life | High-power LEDs — continuous operation up to ~50,000 hours (model dependent) |
| Protection class | IP65 & IP67 (DIN EN 60529) |
| Materials | Housing & end cover: stainless steel 1.4404 (polished). Lens: borosilicate glass ring flange. |
| Voltage & power | 24 V AC/DC- 11 W/15 W;110–230 V AC variants; 11 W / 15 W options (check model). Protected by a 1A miniature fuse; Equipped with 4 or 7 high-power LED |
| Operating ambient | Typical ambient range: −20°C to +40°C (variants may allow up to +50°C). Confirm the model datasheet for exact limits. |
| Mounting | a) Circular sight glass fitting acc. to DlN 28120from DN 40 up b) Circular sight glass fitting acc. to DlN 28121:from DN 40 up c)Sight glasses in flow indicators: from DN 50 up d)Screw-type sight glass fittings similar to DlN11851: -from DN 50 up, the unit is mounted by way of a separate flange attachment -from DN 80 up, the unit is secured using a hinged bracket |
| Technical data Ex protection: | a)Gas EN 60079-0:2012 + A11:2013 EN 60079-1:2014 Explosion group: Temperature class. General Requirements Flame-proof Enclosures ‘IlC (includes llA and lB) T6b）Dust EN 60079-0: 2012 + A11: 2013 EN 60079-31: 2014 Explosion group: Temperature class: General Requirements Protection by Enclosures， t‘IIIC (includes IIIA and IIIB) T80°C |
Important: Under no circumstances should the luminaire be used as a substitute for a sight glass flange or counter-flange. Always follow site safety rules and consult the ESL55 product datasheet before installation.
Installation & electrical options
The ESL55LED-Ex is supplied with factory-fitted cables (typ. 2 m; 10 m on request) or can be supplied with suitable screwed cable glands per EN 60079-14. Mount via the supplied hinged bracket to the sight glass cover flange, or use the slotted nut adapter for screw-type fittings; mounting kits are available as accessories.
Applications
- Illumination for sight & light ports on reactors, bioreactors, and laboratory mixers
- Visual flow indicators and pipeline sight ports in explosive atmospheres
- Food processing, pharma, and chemical plants require a hygienic stainless finish
Downloads & contact
Request quote / CAD
Download ESL55 LED-Ex luminaire datasheet (PDF)
FAQ
- Q: Can ESL55 be used in sterile areas?
- A: Yes — the polished stainless finish and sealed lens make the ESL55 suitable for sterile/food areas when installed per cleaning protocols. Check your local hygiene rules.
- Q: What types of LEDs and colors are available?
- A: High-power white LEDs are standard; variants for red, blue, ultraviolet, and infrared are possible — specify when ordering.
