QRB1B-A020B40A Siemens Flame Sensor

Overview

The Siemens QRB1B-A020B40A is a compact, photoresistive flame detector specifically engineered for the supervision of yellow-burning oil flames. Primarily used in intermittent operation, this sensor works in conjunction with Siemens burner controls to ensure operational safety by detecting visible light radiation from the flame. Its high-precision photoresistive element and durable design make it a reliable component for industrial and commercial combustion systems.

Features

• High-sensitivity photoresistive element designed to detect radiation in the visible light spectrum (maximum spectral sensitivity of approximately 600 nm)
• Integrated 2-wire thermoplastic cable for secure and simplified wiring
• Durable, compact housing with a red casing indicating high sensitivity
• Suited for both frontal and lateral (90 degree) illumination to accommodate various burner mounting configurations
• Designed for intermittent operation in systems where the burner must cycle at least once every 24 hours

Specifications

• Model: QRB1B-A020B40A
• Sensitivity: High (Red casing)
• Casing Length: 50 mm
• Visible Cable Length: 20 cm
• Stripped Length: 40 mm
• Protection Rating: IP40
• Operating Temperature: -20 C to +60 C
• Spectral Sensitivity: Approximately 600 nm
• Connection: 2-wire cable with ferrules

Applications

• Supervision of yellow-burning oil flames in industrial and commercial burner systems
• Compatible with Siemens burner controls including LAL, LME7, LMO, LMV, and LOA series
• Suitable for use in package burners, line burners, and various high-temperature heating applications
• Used in HVAC and boiler systems requiring reliable intermittent flame monitoring