Overview
The Siemens QRB1A-A048B70B is a compact, photoresistive flame detector designed for the supervision of yellow-burning oil flames. Engineered for use with Siemens burner controls, this sensor monitors the visible light spectrum of oil flames during intermittent burner operation. The device features a black housing that signifies its normal sensitivity level, ensuring reliable detection and safety for commercial and industrial heating systems. It is constructed with a durable thermoplastic cable and is specifically optimized to match the spectral sensitivity of oil flame radiation.
Features
- Photoresistive sensing element with a maximum spectral sensitivity of approximately 600 nm
- Normal sensitivity level indicated by the black casing color
- Compact design for easy integration into various burner types
- Equipped with a soft plastic plug for secure and simple mounting into a burner hole with a lateral groove
- Integrated two-wire thermoplastic cable for straightforward electrical connection
- Designed for both frontal and lateral (90 degree) illumination
- High-quality construction built to withstand harsh environmental conditions in heating applications
Specifications
- Model: QRB1A-A048B70B
- Part Number: BPZ:QRB1A-A048B70B
- Sensitivity: Normal
- Casing Color: Black
- Casing Length: 50 mm
- Visible Cable Length: 48 cm
- Stripped Length: 70 mm
- Protection Rating: IP40
- Operating Temperature Range: -20 C to +60 C
- Weight: Approximately 0.012 kg
- Origin: Made in Germany
Applications
- Supervision of yellow-burning oil flames in commercial and industrial burners
- Used in conjunction with Siemens burner controls such as the LAL, LME7, LMO, LMV, and LOA series
- Suitable for intermittent burner operation where flame monitoring in the visible light spectrum is required
- Ideal for HVAC and boiler systems requiring precise and reliable flame detection for safety and performance optimization



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