Siemens QRB4A-B070B70A flame sensor

Siemens QRB4A-B070B70A flame sensor — a highly sensitive photodetector for monitoring flame presence in oil-fired 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-B070B70A monitors the combustion process by detecting the light emission of the flame and transmitting a signal to the burner control. If the flame goes out, the sensor instantly initiates an emergency fuel shut-off, helping to prevent accidents, protect equipment, and improve the safety of the heating system. This model features high sensitivity, reliable operation, and resistance to long-term operational loads. The sensor is widely used in diesel and heavy oil burners of heating boilers, heat generators, and other equipment requiring precise flame monitoring and uninterrupted automatic operation. Advantages of Siemens QRB4A-B070B70A: • 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 minimal maintenance Specifications: • Device type: flame sensor / photodetector • Model: Siemens QRB4A-B070B70A • 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 • Housing material: heat-resistant plastic • Manufacturer: Siemens • Country