Siemens QRB4A-B050B70A flame sensor

Siemens QRB4A-B050B70A flame sensor — a highly sensitive photodetector for monitoring flame presence in oil burners. The device is designed for use in automatic combustion control systems and ensures safe, stable, and efficient operation of boiler and heat engineering equipment. The Siemens QRB4A-B050B70A detects the light emission of the flame and transmits a signal to the burner control unit. If the flame goes out, the sensor instantly initiates an emergency shutdown of the fuel supply, helping to prevent accidents, enhance equipment safety, and protect the system from damage. This model features high sensitivity, resistance to operational loads, and reliable operation over a long period. The sensor is widely used in diesel and fuel oil burners of heating boilers, heat generators, and other equipment where precise flame monitoring and uninterrupted automatic control are required. Advantages of Siemens QRB4A-B050B70A: • Reliable flame presence monitoring • Fast response to flame loss • Suitable for oil burners • High sensitivity and stable operation • Compatibility with Siemens burner controls • Compact design and easy installation • Durability and minimal maintenance Specifications: • Device type: flame sensor / photodetector • Model: Siemens QRB4A-B050B70A • Purpose: flame monitoring for oil burners • Fuel type: diesel, fuel oil • Operating principle: photoelectric flame detection • Compatibility: Siemens burner controls of LOA, LMO series and similar • Application: boilers, heat generators, burner devices • Mounting: integrated into burner • Housing material: heat-resistant plastic • Manufacturer: Siemens • Country