QRB1A-A020B40A Siemens Flame Sensor

Overview

The Siemens QRB1A-A020B40A is a compact photoresistive flame detector designed for the supervision of yellow-burning oil flames in intermittent operation. This high-precision sensor works in conjunction with burner controls to ensure safe combustion by monitoring the visible light spectrum of the flame. It features a robust black casing and is engineered for rapid, reliable detection to prevent hazards in industrial and commercial burner systems.

Features

• Photoresistive sensing element with maximum spectral sensitivity of approximately 600 nm
• Normal sensitivity calibration suitable for standard oil flame monitoring
• Compact 50 mm housing design for versatile installation
• Integrated 2-wire thermoplastic cable for simplified wiring
• Designed for both frontal and lateral (90 degree) illumination
• Durable construction suitable for demanding industrial environments

Specifications

• Model: QRB1A-A020B40A
• Sensing Type: Photoresistive
• Sensitivity: Normal
• Casing Color: Black
• Casing Length: 50 mm
• Visible Cable Length: 20 cm
• Stripped Cable Length: 40 mm
• Protection Rating: IP40
• Operating Temperature: -20 C to +60 C
• Weight: Approximately 0.25 kg

Applications

• Supervision of yellow-burning oil flames in industrial burners
• Used with Siemens burner controls including LAL, LME7, LMO, LMV, and LOA series
• Suitable for intermittent burner operation cycles
• Applied in combustion systems, industrial furnaces, and boiler rooms
• Ideal for OEMs integrating flame detection into specialized heating equipment