QRB3S(1) Siemens Flame Detector

Overview

The Siemens QRB3S(1) is a high-sensitivity photoresistive flame detector specifically designed for the supervision of yellow-burning oil flames in intermittent operation. This compact sensor is a critical safety component used in conjunction with Siemens burner controls, such as the LAL, LME7, LMO, LMV, and LOA series. It features a metal protection tube and is supplied with a small flange and clamp for secure, vibration-free mounting. The QRB3S(1) is engineered to detect radiation in the visible light spectrum, ensuring reliable flame monitoring for small to medium-capacity industrial and commercial burners.

Features

• High-sensitivity photoresistive sensing element for precise detection of yellow-burning oil flames
• Integrated metal protection tube (17 mm diameter) for enhanced durability in harsh combustion environments
• Supplied with a small flange and clamp to ensure correct alignment and stable mounting
• Suited for both frontal and lateral (90 degree) illumination to accommodate various burner designs
• Spectral sensitivity maximum of approximately 600 nm to align with the visible light of oil flames
• Compact design with a plug-in connection for simplified installation and maintenance

Specifications

• Model: QRB3S(1)
• Sensitivity: High
• Protection Tube Material: Metal
• Protection Tube Diameter: 17 mm
• Mounting: Small flange and clamp included
• Spectral Sensitivity: Maximum approximately 600 nm
• Degree of Protection: IP40
• Operating Temperature: -20 C to +60 C
• Weight: Approximately 35 g (without cable)
• Compatibility: Siemens burner controls LAL, LME7, LMO, LMV, and LOA

Applications

• Supervision of yellow-burning oil flames in industrial and commercial heating systems
• Used in intermittent burner operations where the burner control cycles frequently
• Ideal for small to medium capacity burners requiring high-sensitivity flame detection
• Suitable for integration by Original Equipment Manufacturers (OEMs) into burner safety trains
• Applicable for both new installations and as a replacement part in existing Siemens-controlled oil burner systems