Siemens QRB1B-A070B70A flame sensor

Siemens QRB1B-A070B70A flame sensor — a reliable photoelectric flame detector for liquid fuel burners, designed for safe operation of boiler and heat engineering equipment. The device is used in automatic combustion control systems and provides accurate monitoring of flame presence during burner operation. Siemens QRB1B-A070B70A detects the light emission of the flame and transmits a signal to the burner control unit. If the flame goes out, the sensor instantly triggers an emergency shutdown of fuel supply, helping to prevent accidents, improve equipment safety, and protect the system from damage. The model features high sensitivity, stable operation, and reliability under long-term use. The sensor is widely used in diesel and heavy oil burners of heating boilers, heat generators, and other heat engineering equipment requiring precise and stable combustion monitoring. Advantages of Siemens QRB1B-A070B70A: • Reliable flame presence monitoring • Fast response to flame loss • Suitable for liquid fuel burners • High sensitivity and operational stability • Compatibility with Siemens burner controls • Compact design and easy installation • Durability and simple maintenance The Siemens QRB1B-A070B70A flame sensor is in demand in residential, commercial, and industrial heating systems where safety, uninterrupted operation, and efficient combustion control are critical. Using original Siemens equipment helps reduce the risk of emergency shutdowns and extend the service life of burner equipment.