QRB1B-A042B20B Siemens Flame Sensor

Overview

The Siemens QRB1B-A042B20B 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 detects visible light radiation to ensure safe and reliable flame monitoring. It features a red casing to indicate high sensitivity and is typically used in industrial and commercial burner applications.

Features

• High-sensitivity photoresistive detecting element specifically tuned for yellow-burning oil flames
• Compact design with a red thermoplastic casing and integrated 2-wire cable
• Suitable for both frontal and lateral (90 degree) illumination for flexible mounting
• Soft plastic plug design for easy installation into a hole with a lateral groove
• Provides full consideration of the visible light spectrum for accurate detection
• Compatible with a wide range of Siemens burner controls, including LAL, LME7, LMO, LMV, and LOA series

Specifications

• Model: QRB1B-A042B20B
• Sensitivity: High (Selected)
• Casing Color: Red
• Casing Length: 50 mm
• Visible Cable Length: 42 cm
• Stripped Length: 20 mm
• Protection Rating: IP40
• Temperature Range: -20 C to +60 C
• Weight: Approximately 2 lbs

Applications

• Supervision of yellow-burning oil flames in HVAC and industrial burner systems
• Use in intermittent operation burner controls
• Integration into burner systems requiring high-sensitivity flame detection
• Suitable for burners where frontal or 90-degree lateral light entry is required