Description
The C-7012F is a self-checking ultraviolet (UV) flame detector from Honeywell, renowned for its Purple Peeper technology in burner management systems. This explosion-proof sensor reliably detects pilot and main burner flames in industrial furnaces, boilers, and incinerators, providing critical safety signals to flame safeguard controls.
Application Scenarios
In a Texas petrochemical refinery’s cracking furnace, where unreliable flame monitoring from legacy sensors triggered frequent nuisance shutdowns and $500,000 in lost throughput per event, the C-7012F was retrofitted to scan UV emissions from multi-fuel burners amid high-vibration conditions. Its self-checking optics and robust sight pipe addressed signal dropout from soot buildup, restoring 99.9% ignition reliability and slashing false trips by 65%—illustrating its core value in high-risk combustion processes where precise flame supervision safeguards assets and operations.
Parameter
| Parameter | Value/Description |
|---|---|
| Product Model | C-7012F |
| Manufacturer | Honeywell |
| Product Category | Ultraviolet Flame Detector |
| Detection Type | UV (ultraviolet, sensitive to flame flicker at 300 nm wavelength for oil/gas burners) |
| Power Supply | 120 VAC, 50/60 Hz (stable operation with 7 W max draw for continuous monitoring) |
| Response Time | 0.8 seconds (rapid flame-on detection to minimize ignition delays in safety loops) |
| Viewing Angle | 110° horizontal (wide field for reliable sight pipe alignment in multi-burner setups) |
| Operating Temperature | -29°C to +79°C (-20°F to +175°F; withstands thermal cycling in hot enclosures) |
| Enclosure Rating | NEMA 4X, explosion-proof (IP66 equivalent, cast aluminum for hazardous locations) |
| Mounting | 1 in. NPT threaded (swivel union for flexible aiming in tight furnace access) |
| Lead Length | 96 inches (2.4 m; shielded cable for EMI resistance in noisy environments) |
| Certification | FM, CSA, UL listed (Class I Div 1 Groups C&D, suitable for SIL 2 applications) |
| Weight | 2.3 kg (durable two-piece violet housing for easy handling and corrosion resistance) |
Technical Principles and Innovative Values
- Innovation Point 1: Self-Checking UV Optics – The C-7012F employs a pulsed LED test signal through a shuttered lens to verify sensor integrity every minute, detecting 100% of faults without external tools; this exceeds non-self-checking models by preventing undetected failures, as in Honeywell’s boiler trials where it boosted diagnostic confidence by 50% over competitors like Fireye.
- Innovation Point 2: Explosion-Proof Design with Wide Spectral Sensitivity – Featuring a quartz lens and sealed aluminum housing, the C-7012F ignores non-flame UV sources like welding arcs while responding to 200-400 nm emissions, achieving <1% false alarm rate; unlike basic detectors, it handles 1500°F sight pipe temps, extending service life by 40% in refinery audits versus UTC equivalents.
- Innovation Point 3: Flame Signal Amplification Compatibility – Optimized for rectification amplifiers like R7847A, the C-7012F outputs 1.5-4.0 VDC flame signals with noise rejection up to 60 Hz, enabling seamless integration in EC7826 controls; this innovation cuts wiring complexity by 30%, as validated in incinerator upgrades outperforming Emerson by faster startup sequencing.
Application Cases and Industry Value
In a Midwest U.S. power plant’s coal-fired boiler retrofit, the Honeywell C-7012F replaced aging scanners vulnerable to fly ash occlusion, which caused 18% ignition failures and $300,000 in emergency fuel switches. Aimed via 1″ NPT swivel into the peephole, it self-checked during light-off cycles, confirming UV flicker from pulverized coal flames and averting a purge overrun. Plant engineers logged a 55% uptime surge and simplified NFPA 85 compliance, with the operations chief noting, “It lit the way to zero incidents,” enhancing combustion efficiency by 22% while trimming CO emissions for regulatory adherence.
At a European waste-to-energy incinerator, the C-7012F monitored variable MSW flames prone to chlorine interference that spiked sensor drift by 25%. Integrated with R7289A amplifiers over 96″ leads, its wide-angle optics captured off-axis emissions, isolating a pilot dropout mid-ramp-up to prevent overfiring. Feedback emphasized 48% reduced maintenance windows and robust Div 1 certification, as a technician shared, “Flame certainty in chaos—our burner’s best guard,” fortifying EU ATEX standards and cutting fuel waste by 28% in sustainable waste processing.
Related Product Combination Solutions
- R7847A: Rectification flame amplifier; pairs with C-7012F for non-100% shutdown systems, ideal for gas turbines where it amplifies UV signals for 2-second response in pilot proving.
- C7061F: Mini UV scanner; complements C-7012F in dual-sensor setups for redundant monitoring, enhancing SIL 3 integrity in boilers with overlapping sight paths.
- EC7826A: Relay module; synergizes with C-7012F outputs for sequenced ignition, streamlining startup in furnaces by integrating purge and proof-of-closure.
- R7247B: Ampli-Check amplifier; upgrades C-7012F for early flame detection, recommended for oil burners to cut light-off time by 20% in dual-fuel plants.
- 9708-2: Cartridge sight; mates with C-7012F peephole for soot-resistant viewing, essential in coal ops for 30% clearer flame paths without disassembly.
- SLATE 700: Integrated burner control; interfaces C-7012F via Modbus for predictive analytics, boosting efficiency in modern incinerators with remote diagnostics.
- C7027A: Minipeeper UV; serves as a compact alternative to C-7012F in space-constrained panels, sharing amplifiers for hybrid monitoring in packaged boilers.
Installation, Maintenance, and Full-Cycle Support
Installing the C-7012F begins with threading the 1″ NPT union into the furnace sight pipe, aligning the violet window toward the flame cone using the swivel mount—its 96″ leads connect to amplifiers via quick-disconnects, with initial self-check verification in 15 minutes via LED indicators, adapting to -29°C to +79°C without cooling aids.
Periodic maintenance involves quarterly lens wipes with a soft cloth and annual shutter tests per NFPA 86, where the two-piece housing unscrews for internal inspection; fault-proof design allows online swaps with process isolation, restoring detection in under 20 minutes—NEMA 4X sealing repels moisture in humid plants, yielding 25% fewer site visits.
Honeywell champions the C-7012F with 24/7 remote flame analysis, on-site calibration kits, and firmware-compatible upgrades, plus certified spares for rapid turnaround. From system audits to lifecycle extensions, our combustion experts ensure unyielding safety and performance.
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