Siemens QRB4B-B025B40B flame sensor

Siemens QRB4B-B025B40B flame sensor is 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 monitoring of flame presence during burner operation. Siemens QRB4B-B025B40B detects the light emission of the flame and transmits a signal to the burner control. When the flame goes out, the sensor instantly initiates an emergency shutdown of fuel supply, helping to prevent accidents, increase operational safety, and protect the system from damage. The 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 where reliable combustion monitoring and uninterrupted automatic operation are required. Advantages of Siemens QRB4B-B025B40B: • 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-B025B40B • Purpose: flame monitoring for oil-fired burners • Fuel type: diesel fuel, heavy oil • Operating principle: photoelectric flame monitoring • Compatibility: Siemens burner controls of LOA, LMO series and similar • Application area: boilers, heat generators, burner devices • Installation: built into burner equipment • Housing material: heat-resistant plastic