Flame Monitoring
Reliable safety under extreme conditions.
Optical fiber lances are an extension of flame monitoring systems and are ideal for applications with strong vibrations, limited space, or for use with tilting burners. They possess a high temperature resistance of up to 400 °C and consist of glass fibers within a flexible, robust cable that is protected against water, dust, acid, and temperature.
Optical Fiber Lance
Optical fiber lances feature high temperature resistance, are vibration-proof, and robust. This makes them ideal for the following applications:
- In locations with strong vibrations at the viewing position
- Limited space at the viewing position
- Ideal for tilting burners
The optical fiber has a temperature resistance of up to 400 °C. The glass fibers are encased in a flexible and robust cable with a steel braid and a silicone sheath. This protects the optical fiber from water, dust, as well as acid and temperature. For the optical fiber lances, glass fibers are available for all sensors and spectral ranges. The lengths of the lances depend on the local conditions and are determined in collaboration with the customer. The lance head contains an optic that focuses the flame signal onto the fiber optic bundle. The temperature resistance is 400 °C. The total length should not exceed 20 meters.
Construction
Optical fiber lances are custom-manufactured. The lance consists of a combination of rigid and flexible sections. Purging and cooling air is typically introduced in the rigid section. For maintenance, the optical fibers can be easily removed from the system and reinserted.
Applications
Optical fiber lances can be mounted directly at the fuel outlet of the burner assembly, thus capturing the flame radiation from a short distance. This achieves high flame intensity and security against extraneous light in multi-burner systems.
Flame monitoring is consistently ensured, especially with tilting burners that have a dynamic viewing position. Here too, monitoring is accomplished using the optical fiber lance. The lance head, with its integrated optics, is fixed at the burner mouth and always transmits the flame signal optimally. Purging and cooling air channels prevent the optical fibers and the optics from overheating.
Why Choose Light Guides from FOS Inon Fiber Optics?
Quality “Made in Germany” pays off. Thanks to our proprietary manufacturing and testing processes, we offer custom solutions for numerous applications, from laboratories to aerospace.
Manufacturing Process
To ensure our light guides and fiber optic products meet the highest standards, we rely on a specialized manufacturing process. This allows us to guarantee exceptional chemical and tactile robustness so they can perform optimally in their respective environments. Precision is a critical factor in this, true to our motto: “Making the impossible happen.”
Materials Used
- Borosilicate: Glass with high temperature resistance and chemical resilience.
- PMMA (Polymethylmethacrylate): A thermoplastic, lightweight plastic with high light transmittance.
- Silica-Hard Clad: A robust plastic coating for improved strength and durability.
- Silica-Silica for UV and NIR Wavelengths: Our specialized glass fibers, optimized for the transmission of light in the ultraviolet (UV) and near-infrared (NIR) ranges.
Optional Specifications:
- Various apertures available
- Polarization can be maintained
- Anti-reflection coating possible
- Various lengths, diameters, bending radii, converters, and vacuum feedthroughs optional
- Various connectors and ferrules suitable for industry and medicine
Technical Data
- Spectral Transmission: UV: 190 nm – 1200 nm | IR: 1100 nm – 2200 nm
- Temperature Range: -45°C … +400°C
- Ø Optical Fiber with Interlock Hose: approx. 17 mm
- Material: Stainless Steel
- Bending Radius: min. >125 mm
- Sighting Tube Connection: According to system specification
- Sensor Connection: According to customer specification
- Purge and Cooling Air: approx. 6 m³/h
Learn More
Do you require further information, a customized quote, or expert consultation for your project? We are at your disposal at any time.
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Our certification to ISO 9001:2015, achieved less than two years after the company’s founding, proves that our commitment to quality is not just an idea. We provide our customers not only with the promise of quality and reliability, but also with certified assurance.
