Siemens QRB4A-B150B70A flame sensor

Siemens QRB4A-B150B70A flame sensor is a reliable photodetector for flame monitoring in liquid fuel burners, designed for safe and stable operation of boiler and heat engineering equipment. The device is used in automatic combustion control systems and provides accurate flame presence detection during burner operation. Siemens QRB4A-B150B70A detects the light emission of the flame and transmits a signal to the burner control. If the flame goes out, the sensor instantly triggers an emergency fuel shut-off, helping to prevent accidents, improve equipment safety, and protect the system from damage. The model features high sensitivity, stable operation, and reliability over 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 reliable combustion control and uninterrupted automation operation. Advantages of Siemens QRB4A-B150B70A: • Reliable flame presence monitoring • Fast response to flame loss • Suitable for liquid fuel burners • High sensitivity and stable operation • Compatibility with Siemens burner controls • Compact design and easy installation • Durability and simple maintenance Specifications: • Device type: flame sensor / photodetector • Model: Siemens QRB4A-B150B70A • Purpose: flame monitoring for liquid fuel burners • Fuel type: diesel fuel, heavy oil • Operating principle: photoelectric flame detection • Compatibility: Siemens burner controls series LOA, LMO and similar • Application: boilers, heat generators, burner devices • Mounting: integrated into burner equipment • Housing material: heat-resistant plastic