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ESL25 LED Explosion-Proof Sight Glass Light
The ESL25 LED Explosion-Proof Sight Glass Light is designed to provide bright, glare-free illumination for sight glasses, reactors, pipelines, and pressure vessels operating in hazardous areas. Featuring an ATEX-compliant stainless steel housing, high-efficiency LED technology, and IP65/IP67 protection, it delivers reliable lighting for demanding industrial environments.
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Technical data
ESL25 LED Explosion-Proof Sight Glass Light Overview
The ESL25 LED Explosion-Proof Sight Glass Light is engineered for safe and efficient illumination of industrial sight glasses, process vessels, reactors, tanks, and pipeline observation ports located in hazardous environments. Built with a corrosion-resistant stainless steel housing and high-performance LED light source, it provides uniform, glare-free illumination while generating minimal heat.
Designed for installation alongside circular sight glass fittings or separate lighting ports, the ESL25 is suitable for gas Zone 1/2 and dust Zone 21/22 hazardous locations. Its compact design, long LED service life, and IP65/IP67 protection make it an ideal lighting solution for chemical processing, pharmaceutical manufacturing, food production, biotechnology, and petrochemical industries.
ESL25 LED Explosion-Proof Sight Glass Light— Technical Data
| Specification | Details |
|---|---|
| Product Name | ESL25 LED Explosion-Proof Sight Glass Light |
| Light Source | High-Efficiency LED |
| Housing Material | Stainless Steel 316L (1.4404) |
| Lens Material | Borosilicate Glass |
| Explosion Protection | ATEX |
| Hazardous Area | Gas Zone 1 & 2 / Dust Zone 21 & 22 |
| Protection Rating | IP65 / IP67 |
| Input Voltage | 24V AC/DC or 110–230V AC |
| Power Consumption | Approx. 7.5 W |
| Color Temperature | Approx. 6500 K |
| Beam Angle | 12°, 25°, 38° (Optional) |
| Mounting | Hinged Bracket / Adapter Mount |
| Applications | Sight Glasses, Reactors, Tanks, Pipelines |
Dimensions and electrical data for Lumistar luminaire ESL25LED-Ex:


• Components and materials:
– Body of luminaire: Stainless steel 1.4404, polished
– Fastening components: Stainless steel 1.4301
– Cable entry gland: M20 x 1.5
– Weight: 1.8 kg
• Connecting data: Temperature classification and electrical parameters (see also EU Type-Examination Certificate)
| Item | ESL25LED-Ex | Variant with 2 m connection cable part no. | Variant with cable gland 7-12 mm part no. | Variant for sterile applic. with 2 m connection cable part no. | Ambient temperature range -20℃ ≤ Tₐ ≤ +50℃ | |
|---|---|---|---|---|---|---|
| 1 | 24 V AC/DC – 7.5 W | 3540.924.00 | 3540.949.00 | 3542.015.00 | 2G T6 | 2D T80℃ |
| 2 | 110-230 V AC – 7.5 W | 3540.925.00 | 3540.950.00 | 3542.016.00 | 2G T6 | 2D T80℃ |
KEY FEATURES
Explosion-Proof Design
Certified for hazardous gas and dust environments to ensure safe operation.
High-Efficiency LED
Bright, energy-saving illumination with an extended service life.
Glare-Free Lighting
Optimized optics provide uniform illumination for clear process observation.
Corrosion-Resistant Housing
Stainless steel construction withstands harsh industrial environments.
IP65/IP67 Protection
Dust-tight and water-resistant for reliable outdoor and process applications.
Low Maintenance
Long-life LEDs reduce replacement frequency and maintenance costs.
TYPICAL APPLICATIONS
- Pressure Vessels
- Chemical Reactors
- Boilers & Steam Systems
- Pipeline Sight Glass Assemblies
- Pharmaceutical Equipment
- Food & Beverage Processing
- Industrial Observation Ports
FAQ
A:It provides safe and reliable illumination for sight glasses, reactors, tanks, and process vessels located in hazardous industrial environments.
A:Yes. It is designed for use in hazardous gas Zone 1 & 2 and dust Zone 21 & 22 environments when supplied in the certified configuration.
A: Typical models are available for 24V AC/DC and 110–230V AC power supplies.
A: The ESL25 can be installed on many circular sight glass fittings, pipeline sight glasses, reactors, and pressure vessels using the appropriate mounting bracket or adapter.
A: Yes. We provide different voltage options, beam angles, cable lengths, mounting accessories, and customized solutions for specific industrial applications.
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