Overview
The Siemens QRA10.C is a normal-sensitivity ultraviolet (UV) flame detector designed for the supervision of gas or oil flames and for ignition spark proving. Housed in a durable die-cast aluminum casing, this sensor is engineered for intermittent operation in industrial and commercial burner systems. It works by detecting the UV radiation emitted by a flame to generate a flame signal, ensuring reliable monitoring while remaining insensitive to glowing firebrick, daylight, or boiler room lighting.
Features
- Normal sensitivity UV-sensitive cell designed for gas and oil flame detection
- Durable die-cast aluminum housing provides robust protection for industrial environments
- Integrated 1-inch mounting coupling and connection facility for cooling air
- Bayonet fitting allows for easy attachment to mounting couplings or glass holders
- IP54 protection rating to prevent ingress of dust and splashing water
- Designed for intermittent operating modes with various Siemens burner controls
Specifications
- Model: QRA10.C
- Sensing Type: Ultraviolet (UV)
- Sensitivity: Normal
- Spectral Response: 190 to 270 nm
- Housing Material: Die-cast aluminum
- Protection Rating: IP54 (IP65 achievable with AGG08)
- Weight: Approximately 0.74 kg (1.6 lbs)
- Ambient Temperature Range: -20 C to +60 C
- Average Life of UV Cell: 10,000 hours at 50 C
- Maximum Combustion Chamber Pressure: 50 mbar
Applications
- Supervision of gas flames and yellow or blue-burning oil flames
- Ignition spark proving in burner systems
- Use in combination with Siemens burner controls such as LFL, LFE1, LMG, and LME series
- Integration into industrial and commercial package burners and boilers


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