Siemens QRA53.G17: Advanced UV Flame Detector for Industrial Burners
The Siemens QRA53.G17 is a high-sensitivity ultraviolet (UV) flame detector specifically engineered for the supervision of gas and oil flames. This specialized sensor is designed to monitor both the main flame and the ignition spark in industrial combustion systems. Operating in conjunction with Siemens burner controls, the QRA53.G17 ensures the highest level of safety by providing rapid and reliable flame detection, which is essential for preventing hazardous fuel accumulations.
Housed in a rugged die-cast aluminum enclosure, this detector is built to withstand the demanding thermal and mechanical conditions of boiler rooms and industrial heating plants, ensuring long-term operational stability.
Technical Specifications and Operational Characteristics
Based on the official Siemens manufacturer technical documentation, the QRA53.G17 includes the following characteristics:
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Detection Principle: Ultraviolet radiation sensor optimized for gas and oil combustion.
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Sensitivity Level: Normal sensitivity (G17 version) for standard industrial flame profiles.
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Enclosure Material: Robust die-cast aluminum housing with integrated cooling air connection.
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Degree of Protection: IP54-rated (can be increased to IP65 with appropriate sealing).
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Ambient Temperature Range: Rated for operation from -20 °C up to +60 °C.
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Compatibility: Designed for use with Siemens burner control series LGK16… and LGI16…
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Mounting: Flexible installation via a mounting flange or threaded connection.
Strategic Benefits for Combustion Infrastructure
The QRA53.G17 offers key advantages for high-tier thermal energy systems:
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Selective Spectrum Detection: The UV cell is selectively sensitive to the ultraviolet range of the flame, ensuring it is not affected by the infrared radiation emitted by hot refractory brickwork.
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Thermal Protection: The integrated cooling air connection allows for the introduction of air to protect the sensor against high temperatures and to keep the lens free from soot and dust.
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Reliable Signal Transmission: Engineered for consistent signal output, providing the burner control unit with accurate data for the safe management of the combustion cycle.
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Industrial Durability: The heavy-duty design minimizes mechanical wear and resists the vibration levels typical of large-scale burner fronts.
