QRB1B-A018B40B Siemens Flame Sensor

Overview

The Siemens QRB1B-A018B40B is a compact, photoresistive flame detector designed for the supervision of yellow-burning oil flames. Engineered for use with Siemens burner controls in intermittent operation, this high-sensitivity sensor monitors the visible light spectrum of the flame. It serves as a critical safety component by ensuring the fuel supply is shut down if no flame is detected, preventing hazardous oil build-up. The detector features a red housing to indicate its higher sensitivity level and comes with an integrated two-wire thermoplastic cable.

Features

• High-sensitivity photoresistor element specifically tuned for yellow-burning oil flames
• Compact design with a durable red plastic housing to resist thermal shock and mechanical stress
• Integrated 18 cm two-wire thermoplastic cable with 40 mm stripped ends and ferrules
• Suitable for both frontal and lateral (90 degree) illumination mounting
• Designed for intermittent operation in commercial and industrial burner systems
• Easy installation with support for mounting via flanges or soft plastic plugs

Specifications

• Model: QRB1B-A018B40B
• Sensitivity: Higher (indicated by red casing)
• Casing Length: 50 mm
• Cable Length: 18 cm (visible)
• Stripped Length: 40 mm
• Spectral Sensitivity: Maximum approximately 600 nm
• Protection Rating: IP40
• Operating Temperature: -20 C to +60 C
• Connection: 2-wire cable with ferrules, without plug

Applications

• Supervision of yellow-burning oil flames in oil-fired burners
• Compatible with Siemens burner controls including LAL, LME7, LMO, LMV, and LOA series
• Used in package burners, industrial line burners, and various indirect air heaters
• Suitable for residential heating systems, industrial water heaters, and space heaters
• Ideal for OEMs integrating flame detection into burner equipment for intermittent operation