QRB3S Siemens Flame Detector

Overview

The Siemens QRB3S is a high-sensitivity, photo-resistive flame detector designed for the supervision of oil flames in the visible light spectrum. It is primarily used with Siemens burner controls in intermittent operation, specifically for smaller capacity burners. The QRB3S features a compact design with a protective metal tube and is engineered to detect yellow-burning oil flames by utilizing a light-sensitive photoresistor element that changes resistance based on light intensity.

Features

• High sensitivity photo-resistive element (identified by a red casing)
• Designed for the supervision of yellow-burning oil flames
• Suitable for both frontal and lateral (90 degree) illumination
• Compact housing with an integrated 2-wire thermoplastic cable
• Supplied with a metal protective tube (17 mm diameter)
• Durable construction suitable for industrial environments
• Easy integration with Siemens burner controls like LAL, LME7, LMO, LMV, and LOA series

Specifications

• Model: QRB3S
• Sensitivity: High (Red casing)
• Spectral Sensitivity: Maximum approximately 600 nm
• Ambient Temperature Range: -20 C to +60 C
• Protection Rating: IP40
• Mounting Position: Optional (Frontal or lateral)
• Protective Tube Diameter: 17 mm
• Weight: Approximately 35 g (without cable)
• Cable Type: 2 x 0.75 mm2 thermoplastic; 5.1 mm diameter

Applications

• Supervision of yellow-burning oil flames in commercial and industrial burners
• Used in connection with burner controls for intermittent operation
• Ideal for small capacity burner systems
• Monitoring ignition sparks in combustion systems
• Integration into OEM burner equipment for safety and flame signal generation