Fireye 4-290-1 Tube

The Fireye 4-290-1 replacement UV tube is a critical component for maintaining reliable flame supervision in industrial burner systems. Designed for use with Fireye UV1A, UV2, and UV8A flame scanners, this ultraviolet sensing tube detects the UV radiation emitted by fossil fuel flames while ignoring infrared signals from hot refractory. As a non-self-checking UV sensor, it is engineered for intermittent operation where the burner cycles at least once every 24 hours. When troubleshooting flame signal loss or nuisance shutdowns, replacing the worn 4-290-1 sensor tube often restores proper peak signal strength to the Flame-Monitor or MicroM control programmed modules. This high-sensitivity bulb is vacuum-sealed and features a standard 4-pin base for rapid field replacement. Ensure the scanner housing and quartz lens are clear of carbon buildup during installation to maintain optimal microamp readings and prevent UV tube solarization or false flame indications.

• Direct OEM Replacement: Compatible with 45UV5 and UV1A series scanners for seamless integration into existing Fireye burner management systems.
• Broad Spectral Response: Specifically tuned to detect wavelengths between 185 and 260 nanometers, ensuring precise flame detection.
• Industrial Durability: Rated for high-ambient temperatures typical of boiler rooms and mechanical headers.
• Optimized Signal Output: Restores consistent 10-25 microamp DC readings to the flame safeguard control.

Common Questions

Can the 4-290-1 be used in continuous pilot applications?
No, this is a non-self-checking component. For burners that operate 24/7 without cycling, you must utilize a self-checking scanner like the 45UV5-1010 to comply with safety codes.

Why is my flame signal fluctuating after installing a new tube?
Ensure the UV tube is seated fully in the socket. If fluctuations persist, check the alignment of the scanner sight pipe or inspect for voltage drops in the scanner wiring.

How do I know when to replace the 4-290-1?
When the flame signal steadily declines below the minimum safety threshold (typically 10 VDC on MicroM units) despite a clean lens, the tube is likely reaching its end-of-life.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.