Siemens Combustion QRA4.U UV Flame Detector

Description

The Siemens QRA4.U is a high-performance ultraviolet (UV) flame detector engineered for precise and reliable flame supervision in commercial and industrial combustion burner systems. Designed to work seamlessly with Siemens burner control units, the QRA4.U continuously monitors the presence of a flame by detecting UV radiation emitted during combustion — providing fast, accurate response to both flame establishment and loss-of-flame conditions.

This detector is an essential component in safe burner operation, helping to prevent unburned fuel accumulation and ensuring compliance with combustion safety standards. Its rugged construction and proven Siemens engineering make it a trusted choice for OEM burner manufacturers, boiler systems, and commercial heating applications.

Key Features

• Ultraviolet (UV) flame detection technology for accurate, interference-resistant flame sensing
• Compatible with Siemens burner control and flame safeguard relay systems
• Fast response to flame presence and flame failure conditions
• Designed for commercial and industrial burner and boiler applications
• Compact, durable housing suitable for demanding combustion environments
• Direct replacement for Siemens QRA4 series flame detectors

Applications

• Commercial and industrial gas and oil burners
• Boiler flame safeguard systems
• OEM burner control panels
• Forced draft and power burner assemblies

Why Choose Siemens QRA4.U

Siemens is a globally recognized leader in combustion controls and flame safeguard technology. The QRA4.U UV flame detector reflects Siemens’ commitment to safety, reliability, and compatibility across a wide range of burner control platforms. When flame supervision accuracy matters, the QRA4.U delivers the dependable performance that HVAC and combustion professionals demand.