ESL25 LED-Ex Luminaire — Explosion-Proof Sight Glass Light
ESL25 LED-Ex luminaire — explosion-proof stainless steel sight glass light, IP65/IP67, long-life LED, certified for gas Zones 1/2 & dust Zones 21/22.
Description
The ESL25 LED-Ex luminaire is an explosion-proof, stainless-steel sight glass luminaire designed for hazardous areas (gas Zones 1/2 and dust Zones 21/22). It delivers dazzle-free, cold LED illumination with long service life and hygienic stainless finish — ideal for flow indicators, sight ports, bioreactors and process vessels.
For mounting on sight glass fittings:
Designed for universal applications, this Ex-type sight glass luminaire has been developed for use in potentially explosive environments.lt is ideal for combined sight glass and light assemblies, either as a single-flange version or with two separate flanged ports.
Key benefits
- Ex certified: II 2G Ex db IIC T6 Gb & II 2D Ex tb IIIC T80°C Db — for gas and dust hazardous locations.
- Compact yet powerful: optimized screw-in lens, large aperture, and narrow/wide beam options (12°, 25°, 38°).
- IP65 / IP67 protection: suitable for harsh process environments.
- Low heat in process: cold LED light prevents unwanted heating in sensitive processes.
- Easy mounting: hinged bracket or slotted nut mounting for DIN 28120 / DIN 28121 / DIN 11851 style fittings.
Quick technical summary
| Parameter | Value / Notes |
|---|---|
| Product | Lumistar Luminaire ESL25LED-Ex |
| Ex ratings | II 2G Ex db IIC T6 Gb & II 2D Ex tb IIIC T80°C Db (Gas Zones 1/2 and Dust 21/22) |
| Beam angles | 12°, 25°, 38° — choose per application |
| Power & voltage | 24 V AC/DC — 7.5 W; 110–230 V AC — 7.5 W (variants). Check the datasheet for exact model numbers. |
| Color temp & flux | ≈ 6500 K; luminous flux ≈ 360–430 lm (model dependent) |
| Materials | Body: stainless steel 1.4404 (polished); fastening parts: stainless steel 1.4301; lens: borosilicate. |
| Protection | IP65 & IP67 (EN 60529) |
| Operating ambient | Up to 50°C (model dependent). Verify in the model datasheet. |
| Mounting compatibility |
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| Accessories | Hinged bracket, slotted nut mounts, cable glands M20x1.5, cable lengths 2 m (standard) or 10 m (on request). |
Important: Do not use the luminaire as a substitute for a sight glass flange or counter-flange. Always follow the installation instructions and the EU Type-Examination certificate requirements.
Installation & electrical options
The ESL25LED-Ex comes with a factory-fitted pressure-tight cable (typ. 2 m; 10 m optional) or can be supplied with a tested M20x1.5 cable gland. Mount using the supplied hinged bracket to the cover flange or mount to the slotted nut for screw-type sight glass units. See installation instructions for torque and sealing notes.
Applications
- Visual flow indicators and pipeline sight ports in hazardous areas
- Bioreactors, laboratory mixers, and process vessels requiring hygienic lighting
- Food, pharmaceutical, and chemical processing plants
Downloads & calls to action
Request quote / CAD
Download ESL25 LED-Ex datasheet (PDF)
FAQ
- Q: Which sizes does ESL25 fit?
- A: Typical compatibility: DN25 (DIN28120), DN40 (DIN28121), flow indicators DN50+; screw-type fittings require an adapter for DN65 or a hinged bracket from DN80. Confirm with the datasheet.
- Q: Is ESL25 suitable for sterile areas?
- A: Yes — polished stainless finish and sealed design make it suitable when installed per hygienic cleaning procedures. Ask about the sleeve variant for aseptic mounting.
- A: ESL25 has EU Type-Examination certificate (e.g., BVS 08 ATEX E 137 referenced in datasheets) and conforms to relevant EN/IEC 60079 requirements. Provide certificate requests at the RFQ stage.
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