Siemens QRA75.A17 UV flame sensor

Ultraviolet flame detector Siemens QRA75.A17 is a high-precision flame monitoring detector 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. Siemens QRA75.A17 provides continuous flame monitoring during burner operation. When the flame disappears, the detector instantly sends a signal to the burner control unit for emergency fuel shut-off, helping to prevent accidents, improve equipment safety and reduce the risk of system damage. The QRA75.A17 model features high sensitivity to UV radiation, resistance to industrial interference and reliable operation under intensive use. The detector is widely used in industrial boilers, heat generators, process furnaces, dryers and other systems requiring accurate and stable combustion control. Advantages of Siemens QRA75.A17: • Reliable flame monitoring via ultraviolet radiation • Fast response to flame loss • Suitable for gas, liquid fuel and dual-fuel burners • Compatibility with Siemens burner controls • High sensitivity and operational stability • Resistance to industrial loads and electromagnetic interference • Easy installation and maintenance The ultraviolet flame detector Siemens QRA75.A17 is in demand in industrial automation and thermal power systems where safety, reliability and uninterrupted burner equipment monitoring are critical. Using original Siemens equipment helps minimize the risk of emergency shutdowns.