Product Overview

The FIREYE 45UV5-1101 is a high-sensitivity ultraviolet (UV) flame scanner engineered for rapid and reliable detection of hydrocarbon fuel flames in industrial combustion systems. As part of Fireye’s trusted 45UV series, the FIREYE 45UV5-1101 delivers exceptional immunity to false alarms caused by hot refractory, background radiation, or artificial lighting, making it ideal for demanding applications such as gas turbines, boilers, furnaces, and thermal oxidizers. This self-contained, intrinsically safe sensor continuously monitors the UV radiation emitted during the early stages of flame ignition—responding within milliseconds to confirm flame presence or trigger a safety shutdown.

Designed for harsh industrial environments, the FIREYE 45UV5-1101 features a rugged stainless steel housing with a high-temperature quartz lens that withstands thermal shock, vibration, and corrosive atmospheres. It operates on a standard 24 VDC power supply and provides a solid-state relay output that interfaces directly with burner management systems (BMS), PLCs, or safety controllers like those from Honeywell, Siemens, or Rockwell Automation. Unlike infrared (IR) scanners, the FIREYE 45UV5-1101 excels in detecting clean-burning flames (e.g., natural gas or propane) that emit minimal IR but strong UV signatures during combustion, ensuring fail-safe operation even in low-luminosity conditions. Its compact form factor and flexible mounting options—including air purge adapters for dirty or high-dust environments—allow seamless integration into new or retrofit combustion control systems worldwide.

 

Main Features and Advantages

Ultra-fast flame confirmation with superior false-alarm rejection: The FIREYE 45UV5-1101 detects the unique UV radiation signature produced only by actual hydrocarbon flames—not by glowing bricks, sunlight, or welding arcs. This specificity enables it to distinguish real flame from common nuisance sources, drastically reducing spurious trips in complex multi-burner systems. Its sub-30 ms response time ensures immediate feedback to the safety controller, critical for preventing furnace explosions during light-off or flameout events.

Robust construction for extreme industrial conditions: Encased in a corrosion-resistant 316 stainless steel body with a high-purity fused quartz window, the FIREYE 45UV5-1101 maintains optical clarity even under prolonged exposure to high heat, steam, or chemical vapors. The quartz lens transmits UV efficiently while blocking longer-wavelength IR and visible light, enhancing signal-to-noise ratio. Optional air purge kits can be added to prevent lens fouling in sooty or particulate-laden flue gases—common in waste incinerators or biomass boilers.

Simple integration and maintenance-free operation: With a standard 1″ NPT thread, the FIREYE 45UV5-1101 installs directly into sight ports or flame rod mounts without custom brackets. Its two-wire DC design simplifies wiring to existing BMS panels, and the solid-state output eliminates mechanical contact wear. No routine calibration or cleaning is required under normal conditions, and the absence of moving parts ensures decades of service life when properly installed.

Global compliance and safety certification: The FIREYE 45UV5-1101 meets stringent international standards for use in hazardous areas, including Class I, Division 1 (FM/CSA) and ATEX Zone 1. making it suitable for oil & gas, chemical processing, and power generation facilities where explosion risk is present. Its intrinsic reliability has made it a de facto industry standard for flame safeguarding in critical combustion processes worldwide.

Application Field

The FIREYE 45UV5-1101 is extensively used across industries where continuous, fail-safe flame monitoring is mandated by safety codes and operational best practices. In power generation plants, it safeguards gas turbine combustors and auxiliary boilers, providing instant flame loss detection to initiate emergency fuel cutoff—preventing catastrophic backfires or pressure surges. Similarly, in refineries and petrochemical facilities, the FIREYE 45UV5-1101 monitors process heaters and thermal oxidizers handling volatile hydrocarbons, ensuring compliance with NFPA 85 and API standards.

In commercial and industrial boiler rooms—from hospitals to district heating plants—the FIREYE 45UV5-1101 replaces older cadmium sulfide (CdS) cells or unreliable thermocouples, offering faster response and greater longevity. It is particularly effective with low-Btu fuels or staged-combustion burners where flame luminosity is weak. Waste-to-energy plants rely on the FIREYE 45UV5-1101 to monitor fluctuating flames in municipal solid waste incinerators, often paired with air purge systems to combat heavy ash buildup.

Food processing, glass manufacturing, and metal heat-treating operations also deploy the FIREYE 45UV5-1101 in high-temperature furnaces where traditional sensors degrade quickly. Because it responds only to true flame UV—not radiant heat—it avoids false “flame present” signals when burners are off but refractory is still glowing red-hot. Across all these settings, the FIREYE 45UV5-1101 serves as a critical layer of protection, enabling safer, more efficient, and code-compliant combustion control.

Related Products

45UV5-1102: Functionally identical to 45UV5-1101 but with a different cable gland or connector option for specific panel interfaces.

45RM1-1020: Remote-mount amplifier unit used with UV sensor heads in high-temperature zones; 45UV5-1101 is self-contained and does not require this.

45UVF1-1010: Fiber-optic UV scanner variant for applications requiring the electronics to be located away from the flame viewport.

Honeywell 7800 Series: Competing flame safeguard controller often used in conjunction with 45UV5-1101 for complete burner management.

Fireye 25UV5: Smaller, lower-cost UV scanner for light-duty applications; 45UV5-1101 offers higher durability and output drive capability.

Siemens LFL1.1: Alternative UV detector with similar specs but different mounting and approval profile.

45UV5-1111: Version with extended temperature rating or modified spectral filter for specialized fuels.

Installation and Maintenance

Pre-installation preparation: Before installing the FIREYE 45UV5-1101. verify that the sight port or peephole provides an unobstructed view of the flame zone and is free of cracks or deposits that could block UV radiation. Ensure the mounting surface is clean and properly tapped for 1″ NPT. Confirm that the power supply is within 20–32 VDC and includes appropriate overcurrent protection (e.g., 1 A fuse). Route signal cables away from high-voltage lines or variable frequency drives to avoid electrical noise interference, and use shielded twisted-pair cable if distances exceed 50 feet. For dirty or high-moisture environments, install an optional air purge collar and supply clean, dry instrument air at 5–10 psi to keep the lens clear.

Maintenance recommendations: The FIREYE 45UV5-1101 requires no scheduled calibration, but periodic visual inspection is recommended—especially in high-soot applications. Check the quartz lens for coating, cracking, or cloudiness during planned outages; clean gently with isopropyl alcohol if needed. Test functionality using a certified UV test lamp or during controlled burner light-off sequences to validate response time and output switching. Never use abrasive cleaners or high-pressure water jets on the sensor. If the FIREYE 45UV5-1101 fails to detect flame consistently, first rule out burner issues (e.g., poor atomization, low fuel pressure) before suspecting the scanner. Due to its solid-state design, the module typically operates reliably for 10+ years with minimal intervention when installed correctly.

Product Guarantee

Every FIREYE 45UV5-1101 we provide is a genuine, factory-new unit sourced through authorized Fireye distribution channels, complete with original labeling, model number engraving, and full compliance with FM, CSA, and CE safety certifications. Each unit undergoes pre-shipment verification of optical sensitivity, output switching, and power integrity to ensure it meets Fireye’s published performance standards. We offer a 12-month warranty against defects in materials and workmanship, along with access to technical support from combustion safety specialists who can assist with application review, installation guidance, and troubleshooting. Our commitment to authenticity and reliability ensures that your safety-critical flame monitoring system built around the FIREYE 45UV5-1101 performs with the precision, speed, and durability demanded by modern industrial standards.