Overview
The Siemens QRB1B-A050B70A is a compact, photoresistive flame detector designed for the supervision of yellow-burning oil flames in intermittent operation. This high-sensitivity sensor is a critical safety component used in conjunction with Siemens burner controls to ensure reliable flame presence detection. It features a photoresistive sensing element that reacts to the visible light spectrum of oil flames, providing essential feedback to the burner management system to prevent hazardous conditions.
Features
- High-sensitivity photoresistor element designed to detect yellow-burning oil flames
- Red casing for easy identification of high-sensitivity model type
- Compact 50mm body length for installation in space-restricted burner environments
- Integrated soft plastic plug for secure mounting and alignment within the burner hole
- Infused 2-wire thermoplastic cable for durable electrical connection
- Spectral sensitivity optimized at approximately 600 nm for visible light radiation
- Protection rating of IP40 for standard industrial indoor applications
Specifications
- Model: QRB1B-A050B70A
- Type: Photoresistive Flame Detector
- Sensitivity: High (Red casing)
- Housing Length: 50 mm
- Visible Cable Length: 50 cm
- Stripped End Length: 70 mm
- Operating Temperature: -20 C to +60 C
- Mounting: Soft plastic plug with sealing and securing ribs
- Protection Class: IP40
- Spectral Sensitivity: Maximum approximately 600 nm
Applications
- Supervision of yellow-burning oil flames in residential and commercial heating systems
- Used in conjunction with Siemens burner controls such as LAL, LME7, LMO, LMV, and LOA series
- Suitable for both frontal and lateral (90 degree) illumination mounting configurations
- Integrated into oil burner safety loops to monitor flame stability and presence
- Ideal for OEMs and replacement in existing HVAC and industrial burner installations



Reviews
There are no reviews yet.