Siemens Combustion QRA4M.U Scanner
The Siemens Combustion QRA4M.U is a high-sensitivity UV flame scanner engineered for the rigorous supervision of gas or oil flames and ignition spark proving in intermittent burner operations. As a veteran-grade flame detector, this sensor utilizes a specialized UV-sensitive cell with two electrodes designed to ignite upon detecting radiation within the 190 to 270 nm spectral range. This ignition triggers the necessary current in the flame detector circuit, providing a critical safety interlock for your burner management system. Housed in a durable aluminum casing with a 3/4"-14 NPSM connecting thread, the QRA4M.U is built for direct pipe mounting and frontal illumination, ensuring a secure and reliable fit on the burner or boiler. Designed specifically for integration with Siemens burner controls like the LFL, LFE1, and LMV series, this unit maintains operational integrity in temperatures up to 60°C. For contractors managing industrial combustion systems, the high-sensitivity rating of this UV sensor ensures rapid response and consistent flame monitoring, even in complex yellow or blue-burning oil applications.
Key Benefits- High Sensitivity Detection: Optimized for challenging applications where standard sensitivity scanners may fail to provide a stable flame signal.
- Rugged Industrial Housing: Features a robust aluminum body with NPSM threading, providing superior protection against mechanical stress in boiler room environments.
- Broad Compatibility: Seamlessly integrates with a wide array of Siemens burner controls, including the LFL, LFE10, LME, and LMV units.
- Versatile Fuel Monitoring: Reliably supervises gas flames, blue-burning oil flames, and ignition sparks, making it suitable for dual-fuel burner setups.
- Intermittent Operation Design: Purpose-built for systems that cycle frequently, ensuring safety through every ignition sequence and run cycle.
What is the spectral sensitivity range of the QRA4M.U?
This scanner is sensitive to ultraviolet radiation in the 190 nm to 270 nm range, ensuring it only responds to the UV light emitted by the flame and not to visible light or infrared radiation from hot refractory surfaces.
How do I ensure the maximum service life of the UV cell?
The UV cell has an average lifetime of approximately 10,000 hours when operated at a maximum ambient temperature of 50°C. To prevent premature degradation, ensure the scanner is not exposed to temperatures exceeding 60°C and protect it from moisture or icing.
Can the UV cell be replaced individually?
No, the UV cell is glued inside the housing and cannot be removed. Once the cell reaches the end of its service life or fails, the entire Siemens QRA4M.U assembly must be replaced to maintain system safety and performance.
This item is not eligible for free shipping.
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.
Siemens Combustion QRA4M.U Scanner
The Siemens Combustion QRA4M.U is a high-sensitivity UV flame scanner engineered for the rigorous supervision of gas or oil flames and ignition spark proving in intermittent burner operations. As a veteran-grade flame detector, this sensor utilizes a specialized UV-sensitive cell with two electrodes designed to ignite upon detecting radiation within the 190 to 270 nm spectral range. This ignition triggers the necessary current in the flame detector circuit, providing a critical safety interlock for your burner management system. Housed in a durable aluminum casing with a 3/4"-14 NPSM connecting thread, the QRA4M.U is built for direct pipe mounting and frontal illumination, ensuring a secure and reliable fit on the burner or boiler. Designed specifically for integration with Siemens burner controls like the LFL, LFE1, and LMV series, this unit maintains operational integrity in temperatures up to 60°C. For contractors managing industrial combustion systems, the high-sensitivity rating of this UV sensor ensures rapid response and consistent flame monitoring, even in complex yellow or blue-burning oil applications.
Key Benefits- High Sensitivity Detection: Optimized for challenging applications where standard sensitivity scanners may fail to provide a stable flame signal.
- Rugged Industrial Housing: Features a robust aluminum body with NPSM threading, providing superior protection against mechanical stress in boiler room environments.
- Broad Compatibility: Seamlessly integrates with a wide array of Siemens burner controls, including the LFL, LFE10, LME, and LMV units.
- Versatile Fuel Monitoring: Reliably supervises gas flames, blue-burning oil flames, and ignition sparks, making it suitable for dual-fuel burner setups.
- Intermittent Operation Design: Purpose-built for systems that cycle frequently, ensuring safety through every ignition sequence and run cycle.
What is the spectral sensitivity range of the QRA4M.U?
This scanner is sensitive to ultraviolet radiation in the 190 nm to 270 nm range, ensuring it only responds to the UV light emitted by the flame and not to visible light or infrared radiation from hot refractory surfaces.
How do I ensure the maximum service life of the UV cell?
The UV cell has an average lifetime of approximately 10,000 hours when operated at a maximum ambient temperature of 50°C. To prevent premature degradation, ensure the scanner is not exposed to temperatures exceeding 60°C and protect it from moisture or icing.
Can the UV cell be replaced individually?
No, the UV cell is glued inside the housing and cannot be removed. Once the cell reaches the end of its service life or fails, the entire Siemens QRA4M.U assembly must be replaced to maintain system safety and performance.
This item is not eligible for free shipping.
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.
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Description
The Siemens Combustion QRA4M.U is a high-sensitivity UV flame scanner engineered for the rigorous supervision of gas or oil flames and ignition spark proving in intermittent burner operations. As a veteran-grade flame detector, this sensor utilizes a specialized UV-sensitive cell with two electrodes designed to ignite upon detecting radiation within the 190 to 270 nm spectral range. This ignition triggers the necessary current in the flame detector circuit, providing a critical safety interlock for your burner management system. Housed in a durable aluminum casing with a 3/4"-14 NPSM connecting thread, the QRA4M.U is built for direct pipe mounting and frontal illumination, ensuring a secure and reliable fit on the burner or boiler. Designed specifically for integration with Siemens burner controls like the LFL, LFE1, and LMV series, this unit maintains operational integrity in temperatures up to 60°C. For contractors managing industrial combustion systems, the high-sensitivity rating of this UV sensor ensures rapid response and consistent flame monitoring, even in complex yellow or blue-burning oil applications.
Key Benefits- High Sensitivity Detection: Optimized for challenging applications where standard sensitivity scanners may fail to provide a stable flame signal.
- Rugged Industrial Housing: Features a robust aluminum body with NPSM threading, providing superior protection against mechanical stress in boiler room environments.
- Broad Compatibility: Seamlessly integrates with a wide array of Siemens burner controls, including the LFL, LFE10, LME, and LMV units.
- Versatile Fuel Monitoring: Reliably supervises gas flames, blue-burning oil flames, and ignition sparks, making it suitable for dual-fuel burner setups.
- Intermittent Operation Design: Purpose-built for systems that cycle frequently, ensuring safety through every ignition sequence and run cycle.
What is the spectral sensitivity range of the QRA4M.U?
This scanner is sensitive to ultraviolet radiation in the 190 nm to 270 nm range, ensuring it only responds to the UV light emitted by the flame and not to visible light or infrared radiation from hot refractory surfaces.
How do I ensure the maximum service life of the UV cell?
The UV cell has an average lifetime of approximately 10,000 hours when operated at a maximum ambient temperature of 50°C. To prevent premature degradation, ensure the scanner is not exposed to temperatures exceeding 60°C and protect it from moisture or icing.
Can the UV cell be replaced individually?
No, the UV cell is glued inside the housing and cannot be removed. Once the cell reaches the end of its service life or fails, the entire Siemens QRA4M.U assembly must be replaced to maintain system safety and performance.
This item is not eligible for free shipping.
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.
