SF810-FOC-IR-TL Fiber Optic Infrared Flame Scanner (Industrial-Grade Combustion Safety)

The ABB SF810-FOC-IR-TL is a fiber optic infrared flame detection system engineered for mission-critical combustion monitoring in extreme industrial environments. Combining SIL2-certified functional safety with advanced IR optical sensing, this scanner provides fail-safe flame supervision for boilers, process heaters, and multi-burner installations where conventional detectors cannot withstand thermal stress, electromagnetic interference, or explosive atmospheres.

Designed for power generation facilities, petrochemical refineries, and heavy industrial heating systems, the SF810-FOC-IR-TL addresses three fundamental challenges: false trip elimination through intelligent IR wavelength filtering, extended service life via remote fiber optic sensing that isolates electronics from heat zones, and compliance-ready SIL2 safety integrity for regulatory approval in hazardous area classifications.

Whether you're upgrading legacy flame safeguard systems or specifying new burner management solutions, this scanner delivers proven reliability with sub-second response times, diagnostic self-monitoring, and seamless integration into ABB's Uvisor flame analysis ecosystem—reducing unplanned shutdowns while maintaining the highest safety standards for combustion operations.

Core Features & Technical Advantages

✓ SIL2 Functional Safety Certification: Meets IEC 61508 requirements for safety instrumented systems in burner management applications, providing documented risk reduction for insurance and regulatory compliance.

✓ Fiber Optic IR Sensing Architecture: High-temperature resistant optical fiber transmits infrared flame radiation to remote electronics, enabling sensor head operation in ambient temperatures exceeding 200°C where traditional detectors fail.

✓ Advanced Spectral Filtering: Selective infrared wavelength detection distinguishes true flame signatures from background thermal radiation, refractory glow, and hot metal surfaces—eliminating 95% of nuisance trips compared to broadband UV detectors.

✓ Threaded Lance Mounting (TL): Precision-machined mounting flange ensures optical alignment stability during thermal expansion cycles, with field-adjustable positioning for optimal flame view geometry.

✓ Electromagnetic Immunity: Fiber optic signal transmission is inherently immune to RFI/EMI from VFDs, arc welding, and high-voltage switchgear—critical for reliable operation in electrically noisy industrial plants.

→ Diagnostic Self-Monitoring: Continuous optical path verification and signal quality analysis with predictive maintenance alerts transmitted to FAU800 flame analysis units for condition-based servicing strategies.

Industrial Application Scenarios

1. Coal-Fired Power Plant Boilers
In pulverized coal combustion systems, the SF810-FOC-IR-TL monitors individual burner flames through dense fly ash clouds and radiant furnace backgrounds. The IR spectral selectivity detects flame extinction within 500 milliseconds, triggering fuel shutoff before unburned coal accumulates—preventing furnace explosions while the fiber optic design withstands continuous 850°C radiant heat exposure that destroys conventional UV scanners within months.

2. Refinery Process Heater Supervision
Petrochemical heaters processing crude oil, hydrogen reforming, or catalytic cracking require flame detection in Class I Division 2 hazardous areas. This scanner's intrinsically safe fiber optic design eliminates ignition sources at the sensor head, while infrared detection maintains reliability despite hydrocarbon vapor interference and soot buildup that blinds UV detectors—reducing false trips by 80% and extending inspection intervals from quarterly to annual maintenance cycles.

3. Multi-Burner Industrial Furnaces
Glass melting furnaces, steel reheat furnaces, and aluminum smelters with 12-24 burners per zone benefit from the scanner's ability to discriminate individual flame envelopes in overlapping radiation fields. When integrated with FAU800 multi-channel analyzers, the system provides burner-specific flame quality metrics (flame intensity, flicker frequency) for combustion optimization—improving fuel efficiency by 3-7% while maintaining continuous safety monitoring.

4. Waste-to-Energy Combustion Systems
Municipal solid waste incinerators and biomass boilers burning variable-moisture fuels experience unstable flame characteristics that challenge traditional detectors. The SF810-FOC-IR-TL's adaptive IR threshold algorithms accommodate flame intensity variations from 10:1 turndown ratios, maintaining positive flame indication during load swings while rejecting false signals from burning debris on grates or refractory hot spots.

5. Cement Kiln Burner Monitoring
Rotary kiln primary and secondary burners operate in 1400°C process temperatures with heavy dust loading from raw meal and clinker. The fiber optic sensor head mounts in water-cooled lances that penetrate kiln hoods, transmitting flame signals through 15-meter armored cables to control room electronics—enabling flame supervision in locations physically inaccessible to conventional detector mounting while surviving kiln thermal shock cycles that fracture ceramic UV tubes.

Technical Parameters & Selection Guide

Selection Criteria: Choose the SF810-FOC-IR-TL when your application involves (1) ambient temperatures exceeding 150°C at the scanner mounting location, (2) heavy electromagnetic interference from nearby electrical equipment, (3) explosive atmosphere classifications requiring intrinsically safe sensors, or (4) SIL2 safety integrity requirements for burner management systems. For gas/oil burners in moderate environments below 100°C, consider UV fiber optic models; for coal/biomass with heavy particulate, infrared detection provides superior reliability.

Extended Functionality & System Integration

Multi-Scanner Redundancy: Large industrial burners (>50 MMBtu/hr) can deploy dual SF810-FOC-IR-TL scanners in 2oo2 voting configurations for SIL3 safety integrity, with each scanner monitoring overlapping flame zones through the FAU800's redundant input channels.

Flame Quality Analytics: When paired with FAU800 analyzers, the system provides real-time flame intensity trending, flicker frequency analysis, and combustion efficiency indicators—enabling predictive alerts for burner tip fouling, air register misalignment, or fuel quality degradation before flame loss occurs.

DCS/PLC Integration: Flame status, diagnostic alarms, and analog flame signal outputs transmit via Modbus RTU, HART, or 4-20mA interfaces to distributed control systems for coordinated burner sequencing, load management, and historical data logging in plant SCADA architectures.

Customization Options: Special fiber optic cable jackets (stainless steel braid, Inconel sheath), extended temperature sensor heads (+300°C rating), and explosion-proof junction boxes available for severe service applications in chemical processing and waste incineration.

Delivery Timeline & Service Assurance

Standard Lead Time: 4-6 weeks for stock configurations (5m/10m cable lengths); 8-10 weeks for custom cable lengths or special certifications (ATEX, IECEx).

Warranty Coverage: 24-month manufacturer warranty covering materials and workmanship defects; fiber optic cable rated for 100,000 thermal cycles under normal operating conditions.

Technical Support: Application engineering assistance for scanner positioning, sight pipe design, and FAU800 configuration parameters; on-site commissioning services available for multi-burner installations.

Documentation Package: Each scanner ships with IEC 61508 safety manual, installation drawings, fiber optic handling procedures, and FAU800 integration guide—plus calibration certificates traceable to ISO/IEC 17025 standards for quality assurance compliance.

Frequently Asked Questions

Q: How does the SF810-FOC-IR-TL interface with existing burner management systems?
A: The scanner connects exclusively to ABB FAU800 Flame Analysis Units, which provide signal processing, relay outputs, and communication protocols (Modbus, HART) for integration with third-party PLCs, DCS systems, or legacy flame safeguard panels. Direct wiring to non-ABB controllers is not supported; the FAU800 acts as the required interface module.

Q: What is the maximum ambient temperature rating for continuous operation?
A: The fiber optic sensor head withstands continuous exposure up to +250°C ambient temperature when properly mounted in a sight pipe or water-cooled lance assembly. The remote electronics module (housed in the FAU800) operates in standard control room environments (-40°C to +85°C). For applications exceeding 250°C, consult factory engineering for high-temperature fiber optic cable options rated to +300°C.

Q: Can this scanner detect pilot flames in addition to main burner flames?
A: Yes, the infrared detection method is sensitive to both pilot and main flame radiation. However, pilot flame monitoring requires careful sight pipe alignment to ensure the fiber optic field of view encompasses the pilot location. For intermittent pilot systems (spark ignition), configure the FAU800 for "pilot proving" mode with adjustable sensitivity thresholds to distinguish pilot from main flame intensity levels.

Q: How often does the fiber optic cable require replacement in high-temperature service?
A: Under continuous 200-250°C exposure, the high-temperature fiber optic cable typically achieves 3-5 years service life before optical transmission degradation requires replacement. The FAU800 monitors signal strength and provides predictive maintenance alerts when optical loss exceeds 30% of baseline values. Proper sight pipe purge air (preventing dust accumulation on the fiber tip) extends cable life significantly.

Q: Is the SF810-FOC-IR-TL suitable for natural gas burner applications?
A: While the infrared scanner functions with natural gas flames, UV fiber optic models (SF810INT-FOC-UV-T-L) are generally preferred for clean gas/oil burners due to stronger UV emission from hydrocarbon flames and lower cost. Reserve IR scanners for applications with high background thermal radiation (coal, biomass, waste fuels) or where UV transmission is blocked by furnace atmospheres or sight glass contamination.

Q: What purge air requirements are necessary for reliable flame detection?
A: Maintain 5-10 SCFH (standard cubic feet per hour) of clean, dry instrument air at 30-50 psig through the sight pipe to prevent dust accumulation on the fiber optic tip and cool the sensor head. Install a pressure switch on the purge air supply with interlock to the FAU800's "scanner fault" input—ensuring the burner management system detects purge air loss before optical contamination causes false flame-off signals.

Secure Your Combustion Safety Upgrade

Ready to eliminate false trips and extend flame scanner service life in your most demanding burner applications? Contact our combustion controls specialists for application-specific scanner positioning recommendations, FAU800 system architecture design, and delivered pricing for your multi-burner project. Request a technical datasheet with spectral response curves and SIL2 certification documentation to support your safety instrumented system design validation.

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