QRB1A-A070B70A1 Siemens Flame Sensor

Overview

The Siemens QRB1A-A070B70A1 is a compact photoresistive flame detector designed for the supervision of yellow-burning oil flames. Primarily used in conjunction with Siemens burner controls, this sensor is engineered to detect visible light radiation, ensuring reliable flame monitoring in industrial and commercial heating systems. It features a robust design with a black casing and is typically mounted using a flange and clamp to ensure precise alignment with the flame.

Features

• Photoresistive sensing element with a maximum spectral sensitivity of approximately 600 nm
• Normal sensitivity levels optimized for yellow-burning oil flames
• Compact design with a 50 mm housing length and a metal protective tube
• Supplied with a 70 cm infused 2-wire thermoplastic cable for flexible installation
• Designed for both frontal and lateral (90 degree) illumination
• Includes a small flange and clamp for vibration-free mounting and secure positioning

Specifications

• Model: QRB1A-A070B70A1
• Sensing Type: Photoresistive
• Sensitivity: Normal
• Housing Length: 50 mm
• Cable Length: 70 cm (700 mm)
• Stripped Cable Ends: 70 mm
• Protective Tube Diameter: 17 mm
• Spectral Sensitivity: Approximately 600 nm (visible light)
• Weight: Approximately 0.09 lbs (0.25 kg)
• Mounting: Small flange and clamp (21 mm spacing)

Applications

• Supervision of yellow-burning oil flames in burner systems
• Compatible with Siemens burner control types LAL, LME7, LMO, LMV, and LOA
• Used in industrial automation, motion controls, and HVAC boiler systems
• Suitable for integration by OEMs into various oil-fired heating products