Overview
The Siemens QRB1C-A050B40A is a highly sensitive photoresistive flame detector specifically designed for the supervision of yellow-burning oil flames. Functioning in the visible light spectrum, this compact sensor is primarily used in conjunction with Siemens oil burner controls in intermittent operation. It features a selected higher sensitivity level, indicated by its blue casing, to ensure reliable flame detection in demanding industrial and commercial combustion systems.
Features
- High-sensitivity photoresistive sensing element optimized for the visible light radiation of yellow-burning oil flames
- Compact design with a blue plastic housing signifying selected higher sensitivity
- Integrated 2-wire thermoplastic cable for direct electrical connection
- Suitable for both frontal and lateral (90 degree) illumination to accommodate various burner mounting configurations
- Vibration-free mounting capability when used with compatible flanges and clamps
- Designed for intermittent operation in industrial and commercial burner applications
Specifications
- Model: QRB1C-A050B40A
- Part Number: BPZ:QRB1C-A050B40A
- Spectral Sensitivity: Approximately 600 nm
- Casing Length: 50 mm
- Visible Cable Length: 50 cm
- Stripped Length: 40 mm
- Sensitivity Type: Selected (High)
- Operating Temperature: -20 C to +60 C
- Weight: Approximately 0.032 kg
- Protection Rating: IP40
Applications
- Supervision of yellow-burning oil flames in intermittent operation
- Used with Siemens burner controls such as the LAL, LME7, LMO, LMV, and LOA series
- Integration into industrial and commercial oil burner systems
- Suitable for replacement in specialized heating equipment from manufacturers like Viessmann and Weishaupt



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