Siemens QRB4B-B050B70B flame sensor

Siemens QRB4B-B050B70B flame sensor — a reliable photodetector for flame monitoring in oil-fired 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 monitoring during burner operation. The Siemens QRB4B-B050B70B detects the light emission of the flame and transmits a signal to the burner control. If the flame goes out, the sensor instantly initiates an emergency fuel shut-off, helping to prevent accidents, improve equipment safety, and protect the system from damage. This model features high sensitivity, stable operation, and reliability during 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 monitoring and uninterrupted automatic operation. Advantages of Siemens QRB4B-B050B70B: • Reliable flame presence monitoring • Fast response to flame loss • Suitable for oil-fired burners • High sensitivity and operational stability • Compatibility with Siemens burner controls • Compact design and easy installation • Durability and simple maintenance Specifications: • Device type: flame sensor / photodetector • Model: Siemens QRB4B-B050B70B • Purpose: flame monitoring for oil-fired 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: built into the burner equipment • Housing material: heat-resistant plastic