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D-LL 7xx
Fibre optic systems
Fibre optic systems for combination with optical flame monitors. Transmission of electromagnetic radiation from the combustion chamber to the flame monitor when direct view is impossible or the connection conditions in place at the burner plate are particularly adverse.
Functionality: Optical flame monitoring
Benefits
- Flexible design for versatile applications
Available in rigid pipe or flexible hose versions; lengths of 20 m and more possible to suit complex setups. - Superior optical performance
Approximately 130 fibers ensure a consistently clear optical view, even in harsh environments. - Continuous operation
The optical system is cleaned during normal operation. - Precise, reproducible alignment
Simplified re-alignment ensures accurate positioning of the optics after each maintenance. - Compatible with various flame scanners
Supports different flame monitors without requiring modifications to the fiber optic system. - Enhanced durability
Robust fiber bundle design ensures long service life and high resistance to wear. - Independent of Ex-certification
Fiber optic system is not part of the flame monitor’s Ex-certificate, offering additional flexibility in hazardous area installations. - Effective protection of optical flame monitor
Shields the monitor from excessive heat, vibration, and contamination for reliable long-term performance.
Applications
- Optical flame monitoring with no direct view
- Optical flame monitoring for very long burners
- Optical flame monitoring for tilting burners
- Very busy burner plates
- High temperatures at the burner plate
- Strong vibrations at the burner plate
Technical Data
- Technical data
- Fiber optic systems
| Spectral transmission | UV, IR |
|---|---|
| Opening angle | 6° |
| Ambient conditions | For fibre optic cable: -40 … +350 °C (–40 … +662 °F) |
| Connections | Purge air G ½″Cooling air (only D-LL 703 and D-LL 701) G ½″ |
| Weight | D-LL 701: Approx. 1.6 kg (3.5 lbs) + 1 kg/m (2.2 lbs/m)D-LL 702: Approx. 1.6 kg (3.5 lbs) + 1 kg/m (2.5 lbs/m)D-LL 703: Approx. 3 kg (6.6 lbs) + 1 kg/m (2.5 lbs/m)D-LL 704: Approx. 2 kg (4.4 lbs) + 1 kg/m (2.5 lbs/m) |
| Material | Intermediate tube/guide tube: Stainless steel 1.4301 |
| Fiber optic systems | Applicable flame sensors and flame monitors |
|---|---|
| D-LL 701, D-LL 702 (direct connection) | D-LE 701 |
| D-LL 701, D-LL 702 (connection via special adapter) | D-LE 703, D-LX 701, D-LX 710, D-LX 721 |
| D-LL 703, D-LL 704 | D-LE 703, D-LX 701, D-LX 710, D-LX 721, D-LX 27x0 |
Accessories
- Recommended
| D-ZS 702 |
| D-ZS 703 |
| D-ZS 704 |