Siemens QRA10M.C UV Flame Detector

📌Overview

Siemens QRA10M.C UV Flame Detector supports cooling air connection and is used for flame monitoring of gas and oil flames in industrial burners. The detector is suitable for use with Siemens combustion controllers and is an intermittent-operation flame detection device. The detector features a bayonet-type housing design and can be installed with various accessories, including D-type mounting fittings, AGG06 glass base, sighting tubes, AGG07 ball head, and other accessories. QRA10M.C detects flames based on UV radiation in the 190–270 nm spectral range and does not respond falsely to the thermal glow of high-temperature refractory materials inside the furnace. The detector is used in high-temperature environments such as boilers and industrial heating systems.

✅Benefits

1. Flame UV Detection: QRA10M.C has a built-in dual-electrode UV sensing tube. When the 190–270 nm ultraviolet radiation emitted by the flame irradiates the sensing tube, the electrodes conduct. A signal current is output during each half-cycle of the AC power supply to provide the combustion controller with a flame presence signal.
2. High-Temperature Protection: QRA10M.C has a reserved cooling air connection on the housing. Cooling air can be supplied to reduce the temperature of the detector body, ensuring normal operation under conditions around high-temperature furnace chambers.
3. Combustion Safety Monitoring: QRA10M.C monitors gas/oil flames. When the flame disappears, the signal current is interrupted, and the associated combustion safety controller performs flame-out protection.

✅Siemens QRA10M.C UV Flame Detector Applications

The detector is an intermittent-operation UV flame detection component used together with Siemens combustion controllers, mainly for flame safety monitoring of industrial combustion equipment.

1. Industrial Boilers

Gas-fired boilers, oil-fired boilers, hot water boilers, and steam boilers. The detector monitors the main burner flame and quickly provides a feedback signal when the flame goes out, allowing the fuel supply to be shut off.

2. Industrial Heating Furnaces and Heat Treatment Furnaces

Annealing furnaces, quenching furnaces, tempering furnaces, forging heating furnaces, and bogie hearth furnaces. High-temperature refractory bricks inside the furnace may produce a red-hot thermal glow. QRA10M.C is not affected by thermal glow, helping prevent false flame signals.

3. Hot Air Furnaces and Drying Equipment

Gas-fired hot air generators, drying kilns, and coating drying lines. Suitable for flame monitoring of oil and gas burners.

4. Incinerators

Waste liquid incinerators, waste gas incinerators, and small solid waste incineration equipment equipped with gas/oil auxiliary burners. Used to monitor pilot flames and main flames.

5. Gas and Oil Burner Package Equipment

Various imported and domestic industrial burners. Suitable for use with Siemens LME, LFS, and LMV series combustion controllers. Some models require AGK30/AGQ1 adapters. The detection angle and installation position can be flexibly adjusted using AGG07 universal ball head, AGG06 glass base, sighting tube, and other accessories.

🔌Technical Specifications

• Humidity ：＜95 % r.h.
• Installation altitude：Max. 2,000 m above sea level
• Climatic conditions ：Class 1K3
• Mechanical conditions ：Class 1M2
• Temperature range ： ‑20…+60 °C
• Weight:0.82kg

🏢Contact Information