QRB1B-A050B40A Siemens Flame Sensor

Overview

The Siemens QRB1B-A050B40A is a compact photoresistive flame detector designed for the supervision of yellow-burning oil flames. It is used primarily in conjunction with Siemens burner controls in intermittent operation. This high-precision sensor is engineered for frontal or lateral (90 degree) illumination and features a soft plastic plug for simplified mounting on the burner. The detector is a critical safety component for industrial and commercial oil burner systems, ensuring reliable flame detection and preventing potential hazards by shutting down the system if a flame is not detected.

Features

• Compact photoresistive flame detector with an infused 2-wire thermoplastic cable
• Designed for the supervision of yellow-burning oil flames in the visible light spectrum
• Soft plastic plug mechanism allows for easy mounting in a hole with a lateral groove
• High sensitivity rating for accurate detection of visible light radiation (maximum spectral sensitivity of 600 nm)
• Integrated guide spring ensures correct alignment of the photoresistive element with the flame
• Sealing and securing ribs on the soft plastic plug provide a firm and vibration-free hold

Specifications

• Model: QRB1B-A050B40A
• Sensitivity: High (Red casing)
• Casing Length: 50 mm
• Visible Cable Length: 50 cm
• Stripped Length: 40 mm
• Protection Rating: IP40
• Operating Temperature: -20 C to +60 C
• Spectral Sensitivity: Approximately 600 nm
• Connection: 2-wire with ferrules, no plug

Applications

• Supervision of yellow-burning oil flames in industrial and commercial burners
• Used in connection with Siemens burner controls such as LAL, LME7, LMO, LMV, and LOA series
• Suitable for burners requiring frontal or lateral (90 degree) light entry
• Intermittent operation burner systems in HVAC and boiler environments