SIEMENS QRA2 flame detector

Industrial burner systems

Boiler and combi systems

Safety applications requiring flame detection

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The SIEMENS QRA2 is a UV (ultraviolet) flame detector used to sense the presence of a flame in industrial burners. It is compatible with Siemens LGB, LME, and LFL burner control units and provides reliable, high-sensitivity flame detection for gas and oil burners.

Flame Detection Type: UV (ultraviolet light)

Detection Wavelength: 190 – 270 nm

Compatible Controllers: Siemens LGB, LME, LFL series

Operating Voltage: Supplied via the controller

Connection Type: Fixed cable or socket connection

Cable Length: Standard 1.5 m (longer versions available)

Mounting: Directly on the burner or via adapter

Operating Temperature: -20°C ... +80°C

Protection Class: IP40 (with housing)

Data Sheet