QRB1B-B100B70A2 Siemens Flame Sensor

Overview

The Siemens QRB1B-B100B70A2 is a high-sensitivity photoresistive flame detector specifically designed for the supervision of yellow-burning oil flames. Often used in intermittent operation, this sensor monitors the visible light spectrum of the flame and communicates with burner controls to ensure safe combustion. Its robust design and high spectral sensitivity make it a reliable component for industrial and commercial burner systems.

Features

• High-sensitivity photoresistive element optimized for yellow-burning oil flames
• Compact and durable red housing for easy integration and identification
• Designed for both frontal and lateral (90 degree) illumination
• Compatible with a wide range of Siemens burner controls, including LAL, LME7, LMO, LMV, and LOA series
• Includes a small flange and clamp for secure, vibration-free mounting
• Integrated cable with ferrules for straightforward electrical connection

Specifications

• Model: QRB1B-B100B70A2
• Sensing Type: Photoresistive
• Sensitivity: High (Red casing)
• Casing Length: 50 mm
• Visible Cable Length: 100 cm
• Stripped Cable Length: 70 mm
• Spectral Sensitivity: Maximum approximately 600 nm
• Protection Rating: IP40
• Operating Temperature: -20 C to +60 C
• Weight: Approximately 2 lbs

Applications

• Supervision of oil flames in industrial and commercial burner systems
• Intermittent burner operations requiring reliable flame presence detection
• Integration into combustion safety loops for boilers and furnaces
• Use in thermal process plants and heating systems using yellow-burning oil fuel