QRB1B-A070B70A1 Siemens Flame Sensor

Overview

The Siemens QRB1B-A070B70A1 is a high-sensitivity photoresistive flame detector designed for the supervision of yellow-burning oil flames. It operates by detecting radiation in the visible light spectrum and is engineered for use with Siemens burner controls during intermittent operation. This compact sensor is a critical safety component, ensuring reliable flame monitoring in residential and industrial oil-fired burner systems.

Features

• High-sensitivity photoresistive element optimized for yellow-burning oil flames
• Red housing for easy identification of high-sensitivity versions
• Designed for both frontal and lateral (90 degree) illumination
• Includes a mounting flange and clamp to ensure vibration-free installation
• Integrated two-wire thermoplastic cable for straightforward electrical connection
• Durable compact design suitable for integration into various burner types

Specifications

• Model: QRB1B-A070B70A1
• Sensitivity: High (Red casing)
• Casing Length: 50 mm
• Visible Cable Length: 70 cm
• Stripped Cable Length: 70 mm
• Protection Rating: IP40
• Operating Temperature: -20 C to +60 C
• Weight: Approximately 0.03 kg
• Spectral Sensitivity: Maximum approximately 600 nm

Applications

• Supervision of yellow-burning oil flames in intermittent burner operations
• Used in conjunction with Siemens burner controls such as LAL, LOA, LMO, and LMV series
• Ideal for small to medium-sized industrial and commercial oil burners
• Suitable for HVAC heating systems and oil-firing technology installations