QRB1B-A033B40B Siemens Flame Sensor

Overview

The Siemens QRB1B-A033B40B is a compact, high-sensitivity photoresistive flame detector designed for the supervision of yellow-burning oil flames. Engineered for intermittent operation, this sensor detects the visible light radiation emitted by the flame and is typically used in conjunction with Siemens burner controls. Its red housing signifies increased sensitivity, making it suitable for specific industrial and commercial burner applications where precise flame monitoring is required.

Features

• High-sensitivity photoresistive element specifically tuned to the visible light spectrum (maximum spectral sensitivity approx. 600 nm)
• Integrated 2-wire thermoplastic cable for easy electrical connection
• Soft plastic plug design for simplified mounting into burner holes with lateral grooves
• Red casing color for easy identification of sensitivity level
• Compact and durable mechanical design suitable for frontal or lateral (90 degree) illumination

Specifications

• Sensitivity: High (Red casing)
• Casing Length: 50 mm
• Visible Cable Length: 33 cm
• Stripped Cable Length: 40 mm
• Cable End: With plug and ferrules
• Protection Rating: IP40
• Temperature Range: -20 C to +60 C
• Spectral Sensitivity: Approximately 600 nm

Applications

• Supervision of yellow-burning oil flames in intermittent burner operations
• Compatible with Siemens burner control series including LAL, LME7, LMO, LMV, and LOA
• Suitable for both frontal and lateral illumination mounting configurations
• Used in industrial and commercial HVAC systems, boilers, and package burners