Siemens QRA4M.U UV flame sensor

Ultraviolet flame detector Siemens QRA4M.U is a highly reliable device for monitoring flame presence in industrial gas, liquid fuel and dual-fuel burners. The detector 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 QRA4M.U provides continuous monitoring of combustion processes and responds quickly to flame loss. When the signal is lost, the device sends a command to the burner control unit for emergency fuel shut-off, helping to prevent accidents and improve industrial safety. The QRA4M.U model features high sensitivity to UV radiation, resistance to industrial interference and stable operation under prolonged use. The detector is widely used in industrial boilers, heat generators, furnaces, dryers and process equipment requiring accurate and reliable flame monitoring. Advantages of Siemens QRA4M.U: • Reliable flame monitoring via ultraviolet radiation • Fast response to flame loss • Suitable for gas, liquid fuel and dual-fuel burners • High sensitivity and operational stability • Compatibility with Siemens burner controls • Resistance to industrial loads and interference • Easy installation and maintenance The ultraviolet flame detector Siemens QRA4M.U is in demand in industrial automation and thermal power systems where safety, uninterrupted operation and precise combustion control are critical. Using original Siemens equipment helps reduce the risk of emergency shutdowns and improve burner equipment efficiency.