The Fireye 85UVF ultraviolet flame detector is a proven solution for reliable flame monitoring in industrial combustion systems. Designed to detect ultraviolet radiation emitted by hydrocarbon flames, the 85UVF series provides fast response, high accuracy, and long-term stability in demanding operating environments.
Widely used in boilers, furnaces, kilns, incinerators, and process heaters, the Fireye 85UVF flame scanner plays a critical role in burner management systems (BMS), ensuring safe ignition, stable operation, and immediate flame failure response.
As part of Fireye’s globally recognized combustion safety portfolio, the 85UVF series is trusted by power plants, petrochemical facilities, steel mills, cement plants, and OEM burner manufacturers worldwide.
How Ultraviolet Flame Detection Works
Ultraviolet flame detection technology is based on sensing UV radiation in the 185–260 nm wavelength range, which is naturally emitted by hydrocarbon flames during combustion. The Fireye 85UVF detector uses a UV-sensitive tube that responds instantly to flame presence while remaining largely immune to visible light and infrared radiation.
Key operating principles include:
Detection of UV emissions generated only during combustion
Rapid flame signal generation within milliseconds
Immediate shutdown signal when flame loss is detected
High resistance to false signals from hot refractories or sunlight
This makes the 85UVF an ideal choice for applications requiring fast flame failure response times (FFRT) and high safety integrity.
Key Features of Fireye 85UVF Flame Detectors
The Fireye 85UVF series is engineered to deliver consistent performance in harsh industrial environments. Key features include:
High Sensitivity UV Detection
The 85UVF provides excellent sensitivity to ultraviolet radiation, ensuring reliable flame detection even with low flame intensity or challenging burner configurations.
Fast Response Time
Fast flame-on and flame-off response supports strict safety requirements and helps prevent fuel accumulation during ignition or operation.
Rugged Industrial Design
Built with durable housings and industrial-grade components, the 85UVF withstands high temperatures, vibration, and electrical noise.
Self-Checking Capability (Selected Models)
Some 85UVF variants support self-checking operation when paired with compatible Fireye amplifiers, improving system reliability and diagnostics.
Broad System Compatibility
The 85UVF flame scanner integrates seamlessly with Fireye flame safeguard controls, amplifiers, and burner management systems.
Typical Applications of the Fireye 85UVF
Fireye 85UVF ultraviolet flame detectors are widely used across multiple industries, including:
Industrial steam boilers
Gas- and oil-fired burners
Process heaters and furnaces
Power generation combustion systems
Petrochemical and refinery units
Cement and steel production lines
Waste incineration systems
Its versatility makes the 85UVF suitable for both continuous-duty burners and intermittent ignition applications.
Fireye 85UVF Installation and Mounting
Proper installation is critical for optimal flame detection performance. The Fireye 85UVF is typically mounted with a clear line of sight to the flame root, ensuring stable UV signal reception.
Installation best practices include:
Avoiding direct exposure to ignition sparks
Shielding the detector from excessive heat sources
Using appropriate sighting pipes or mounting adapters
Ensuring correct electrical grounding
Aligning the detector to avoid flame flicker interference
Following Fireye installation guidelines helps maximize detector life and detection reliability.
Compatibility with Fireye Amplifiers and Controls
The Fireye 85UVF flame detector is designed to operate with a wide range of Fireye flame amplifiers and programmer modules. Common compatible components include:
Fireye UV flame amplifiers
Fireye burner management controllers
Fireye programmer and chassis systems
Fireye purge timers and safety relays
This modular compatibility allows system integrators to design flexible and scalable combustion safety solutions.
Reliability and Safety Compliance
Fireye flame detectors are manufactured under strict quality control standards and comply with international safety and industrial regulations. The 85UVF series supports compliance with burner safety codes such as NFPA, EN, and other regional combustion standards when properly applied.
Its proven field performance reduces nuisance trips while maintaining high safety margins, protecting both equipment and personnel.
Maintenance and Service Life
The Fireye 85UVF requires minimal maintenance under normal operating conditions. Periodic inspection is recommended to ensure:
Clean optical path
Secure electrical connections
Stable flame signal strength
Proper detector alignment
UV sensing tubes typically offer long service life, contributing to reduced downtime and lower total cost of ownership.
Replacement and Upgrade Considerations
In many installations, older 85UVF variants may be replaced by newer Fireye UV flame detectors offering enhanced diagnostics and system integration. When selecting replacements, it is important to verify:
Electrical compatibility
Mechanical mounting dimensions
Amplifier and control compatibility
Safety certification requirements
Working with experienced automation and combustion safety suppliers ensures smooth replacement and system continuity.
Why Choose Fireye 85UVF Flame Detectors
The Fireye 85UVF ultraviolet flame detector remains a preferred choice for industrial combustion monitoring due to its proven reliability, fast response, and robust construction. Its ability to deliver accurate flame detection in challenging environments makes it a trusted solution for safety-critical burner applications worldwide.
For facilities seeking dependable flame monitoring, reduced false trips, and long-term operational stability, the Fireye 85UVF series continues to be a benchmark in UV flame detection technology.
