QRB1A-A050B40A1 Siemens Flame Sensor

Overview

The Siemens QRB1A-A050B40A1 is a compact, photoresistive flame detector designed for the supervision of yellow-burning oil flames in conjunction with burner controls. This high-quality sensor is engineered for intermittent operation, providing essential safety by monitoring the visible light spectrum of the flame. It features a robust black housing and is designed to ensure reliable flame detection in both industrial and commercial heating applications.

Features

• Photoresistive sensing element optimized for the visible light spectrum
• Normal sensitivity levels suitable for standard oil burner applications
• Integrated 2-wire thermoplastic cable for direct electrical connection
• Vibration-free mounting via a specialized guide groove in the securing flange and a cam on the detector clamp
• Flexible illumination options supporting both frontal and lateral (90 degree) light entry
• Compact and durable black casing design

Specifications

• Model: QRB1A-A050B40A1
• Casing Length: 50 mm
• Visible Cable Length: 50 cm
• Stripped Cable Length: 40 mm
• Spectral Sensitivity: Approximately 600 nm (maximum)
• Operating Temperature: -20 C to +60 C
• Protection Rating: IP40
• Included Accessories: Small flange and clamp

Applications

• Supervision of yellow-burning oil flames in heating plants
• Use with Siemens burner controls such as LAL, LME7, LMO, LMV, and LOA series
• Industrial and commercial oil burner systems requiring intermittent operation
• Oil boiler safety monitoring to prevent unstable firing or random shutdowns