Siemens UV Flame Detectors QRA10.C

Energy Combustion, Ahmedabad Importer, Supplier, Trader of all types of Siemens make Flame Sensor, Ultraviolet Flame Sensor,UV CELL , Infrared Flame Sensor. The Siemens QRA10.C is a robust ultraviolet (UV) flame detector housed in a heavy-duty die-cast aluminum casing. It is designed for intermittent operation (systems that shut down at least once every 24 hours) and is primarily used for monitoring gas flames, yellow or blue-burning oil flames, and ignition sparks. The "C" in the model name specifically denotes the standard sensitivity version with a die-cast aluminum housing. Technical Specifications Feature Specification Detection Type Ultraviolet (UV) Spectral Sensitivity 190 to 270 nm Operating Mode Intermittent Operation Sensitivity Normal Protection Rating IP54 (Dust and splash protected) Operating Temperature -20 °C to +60 °C Mounting 1" internal thread (for viewing tube) Connection Terminal screws for wiring Weight Approx. 0.74 kg Replacement UV Cell AGR4 502 1131 0 Key Features Rugged Housing: Unlike the plastic QRA2, the QRA10.C is designed for harsh industrial environments where mechanical durability and better environmental sealing (IP54) are required. Cooling Air Connection: The housing features a connection for cooling air (1/8" thread). This is essential for preventing soot deposits on the lens and for keeping the UV cell within its temperature limits in high-heat applications. Versatile Mounting: It is typically mounted on a viewing tube. The detector can be easily unscrewed from its mounting flange for cleaning without needing to recalibrate the position. Field Serviceable: The internal UV tube (AGR4 502 1131 0) is replaceable, which is a cost-effective alternative to replacing the entire unit if the sensor wears out. Compatible Burner Controls The QRA10.C is compatible with a wide range of Siemens/Landis & Staefa control units, though some require an adapter for the signal to be processed correctly: Direct Connection: LFL, LAL, LGI16, LGK16. With Adapter (AGQ1/2/3): LME21, LME22, LME39, LMV2, LMV3. Comparison: QRA10.C vs. QRA10M.C The primary difference lies in sensitivity: QRA10.C: Standard sensitivity for most industrial burners. QRA10M.C: High sensitivity, used when the flame signal is weak due to a long distance from the sensor or an obscured line of sight. Maintenance Note UV cells naturally degrade over time (approx. 10,000 operating hours). If you experience "Flame Failure" lockouts despite a healthy-looking flame, it is likely the UV cell inside the QRA10.C needs replacement. Always ensure the quartz glass window is clean; a thin film of oil can block UV light entirely.