Description
HONEYWELL 261A1812P012
Technical Specifications:
- Brand: Honeywell
- Model: LG1093AA24 / 261A1812P012
- Product Type: Ultraviolet Flame Detector
- UV Detection Wavelength: 190-290 nm
- Response Time: Less than 200 milliseconds
- Supply Voltage: 260-350 VDC
- Installation Thread: 3/4 inch NPT
- Cable Length: 4.9 meters (standard PTFE cable)
- Housing Material: High-quality stainless steel
- Window Material: Fused quartz
- Origin: United States
Functional Features:
- High-Temperature Resistance: Designed for direct installation near high-temperature burners with integrated cooling air circuit
- UV Spectrum Detection: Highly sensitive to 190-290 nm UV wavelength characteristic of hydrocarbon flames
- Background Interference Rejection: Effectively filters out thermal radiation and visible light interference
- Fast Response: Less than 200ms response time for immediate flame status detection
- Cooling Air Circuit: Built-in cooling air回路 requires external air source to protect sensor in high-temperature environments
- Thermal Shock Resistance: Withstands thermal shock during startup, operation, and shutdown phases
- Smoke and Dust Penetration: Can penetrate smoke and dust interference for stable flame detection
- Stainless Steel Housing: High-quality stainless steel construction with excellent corrosion resistance
- Fused Quartz Window: High light transmittance and thermal shock resistance
- PTFE Cable: Standard 4.9m PTFE cable with excellent insulation and chemical resistance
- Cross-Reference Compatibility: Compatible with GE 261A1812P series flame detection systems
Application Scenarios:
- Industrial boilers and heating furnaces
- Refinery and chemical plant tubular heaters
- Main burner and pilot light flame monitoring
- Waste incineration and energy recovery systems
- Garbage incineration power plants
- Auxiliary burner flame detection
- High-temperature furnace applications
- Combustion safety monitoring systems
- Applications requiring flame detection in smoky or dusty environments
- Any application requiring reliable UV flame detection in harsh conditions
Performance Parameters:
- Detection Wavelength: 190-290 nm UV spectrum
- Response Time: <200 milliseconds
- Supply Voltage: 260-350 VDC
- Temperature Resistance: High-temperature tolerant with cooling air
- Cable Length: 4.9 meters standard
- Installation: 3/4 inch NPT thread
Material Composition:
- High-quality stainless steel housing for corrosion resistance
- Fused quartz viewing window for high UV transmittance and thermal shock resistance
- UV-sensitive detection elements tuned to 190-290 nm
- PTFE (Teflon) insulated cable for chemical and heat resistance
- Precision electronic components for signal processing
- Cooling air circuit components
- Industrial grade connectors and terminals
- Protective mounting hardware
Structural Features:
- Robust stainless steel cylindrical housing
- Front-mounted fused quartz UV window
- Integrated cooling air inlet connection
- 3/4 inch NPT threaded mounting connection
- 4.9 meter PTFE cable assembly
- UV detection sensor element
- Signal processing electronics
- Protective end cap and connector
- Mounting flange or bracket provisions
- Sealed construction for harsh environments
Working Principle:
The 261A1812P012 UV flame detector operates by detecting ultraviolet radiation emitted during the combustion of hydrocarbon fuels. When a flame is present, it emits UV radiation primarily in the 190-290 nm wavelength band. The detector’s UV-sensitive element captures this radiation through the fused quartz window, which is transparent to UV wavelengths while blocking visible and infrared radiation. The sensor converts the UV radiation into an electrical signal that is processed by internal electronics. The cooling air circuit continuously flows clean air through the detector body, protecting internal components from the extreme temperatures near the burner. When flame is detected, the detector sends a signal to the burner management system or flame relay. If the flame extinguishes, the UV signal drops below the detection threshold within 200 milliseconds, triggering an immediate safety response. The detector can distinguish between actual flame UV signals and background thermal radiation, preventing false detections.
