Siemens QRA2.9 UV flame sensor

Siemens QRA2.9 ultraviolet flame sensor — a reliable flame monitoring sensor for industrial gas, liquid fuel and dual-fuel burners. The device is designed to detect ultraviolet radiation from the flame and is used in automatic combustion control systems to ensure safe and stable operation of boiler and heat engineering equipment. The Siemens QRA2.9 provides continuous monitoring of the flame presence during burner operation. If the flame goes out, the sensor instantly sends a signal to the burner control, initiating emergency fuel shut-off. This helps prevent emergency situations, increase safety levels and protect equipment from damage. The sensor features high sensitivity to UV radiation, immunity to industrial interference and stable operation under intensive conditions. The Siemens QRA2.9 is widely used in boiler plants, industrial furnaces, heat generators, drying complexes and other equipment requiring reliable combustion control. Advantages of Siemens QRA2.9: • Accurate flame monitoring via ultraviolet radiation • Fast response upon flame loss • Suitable for gas, liquid fuel and dual-fuel burners • High reliability and long service life • Compatibility with Siemens burner controls • Resistance to industrial loads and interference • Easy installation and maintenance The Siemens QRA2.9 ultraviolet sensor is in demand in industrial automation systems and heat power engineering, where safety, uninterrupted operation and precise combustion control are especially important. Using original Siemens equipment helps reduce the risk of emergency shutdowns and increase the efficiency of burner equipment operation.