QRB1B-A048B70B Siemens Flame Sensor

Overview

The Siemens QRB1B-A048B70B is a high-sensitivity photoresistive flame detector designed for the supervision of yellow-burning oil flames. It is used in conjunction with Siemens burner controls to provide reliable flame monitoring in intermittent operation. This compact sensor identifies the visible light radiation of oil flames, ensuring safety and efficiency by detecting flame disturbances or failures in industrial and commercial combustion processes.

Features

• High sensitivity photoresistive element optimized for a spectral sensitivity of approximately 600 nm
• Red casing design indicating higher sensitivity levels compared to standard models
• Integrated soft plastic plug for secure mounting in burner holes without additional flanges or clamps
• Compact design with a 2-wire thermoplastic cable for easy integration
• Suitable for both frontal and lateral (90 degree) illumination

Specifications

• Model: QRB1B-A048B70B
• Casing Length: 50 mm
• Visible Cable Length: 48 cm
• Stripped Length: 70 mm
• Sensitivity: High (Red casing)
• Connection: 2-wire cable with plug and ferrules
• Protection Rating: IP40
• Temperature Range: -20 C to +60 C

Applications

• Supervision of yellow-burning oil flames in intermittent burner operations
• Compatible with Siemens burner control series including LAL, LME7, LMO, LMV, and LOA
• Industrial combustion systems in power generation, chemical processing, and manufacturing
• Use in oil-fired HVAC and boiler systems requiring precise flame detection