Siemens QRA2 Sensor de llama UV

Siemens QRA2 UV flame detector is a reliable device for monitoring combustion in gas and liquid fuel burners. It responds to the ultraviolet radiation of the flame and transmits a signal to the control unit, ensuring safe and stable operation of the system. The Siemens QRA2 sensor is used in boilers, industrial furnaces, and other installations where constant flame monitoring is important. The device helps prevent accidents and increases the overall safety level of the equipment. Purpose and operating principle The QRA2 flame detector is designed for automatic monitoring of the presence of a flame in the combustion chamber. It detects ultraviolet radiation that appears when burning gas or liquid fuel. If the flame goes out, the QRA2 sensor instantly transmits a signal to the control unit, and the system stops fuel supply. This operating principle prevents gas leakage and eliminates the possibility of ignition outside the combustion chamber. The device is compatible with Siemens LFL, LAL, LGK, LGB burner controls and other Siemens series models. Technical specifications The Siemens QRA2 combines high sensitivity and reliability during long-term operation. Main parameters: Type: ultraviolet flame detector; Supply voltage: from the burner control unit; Operating temperature range: –20 to +60 °C; Spectral sensitivity: UV range (190–270 nm); Connection: locking connector; Cable length: 1 m (extension options available); Manufacturer: Siemens (Germany). The compact housing is protected against vibration and overheating, and the high sensitivity of the sensor ensures accurate response even at minimum flame level. Where QRA2 is used The Siemens QRA2 UV flame detector is used in gas and diesel burners, boilers and furnaces where precise flame control is required.