QRB1B-A050B70A1 Siemens Flame Sensor

Overview

The Siemens QRB1B-A050B70A1 is a compact photoresistive flame detector designed for monitoring yellow-burning oil flames in combustion systems. This high-sensitivity sensor is primarily used in conjunction with Siemens burner controls for intermittent operation, ensuring reliable flame presence detection. It is engineered to detect radiation in the visible light spectrum, specifically optimized for the peak spectral sensitivity of oil flames.

Features

• High-sensitivity photoresistive sensing element for accurate oil flame supervision
• Red casing indicates high sensitivity for easy identification
• Compact 50 mm body length suitable for space-constrained installations
• Designed for both frontal and lateral (90 degree) illumination
• Integrated two-wire thermoplastic cable with pre-stripped ends for easy wiring
• Vibration-free mounting when used with compatible Siemens flanges and clamps

Specifications

• Model: QRB1B-A050B70A1
• Sensitivity: High (Red casing)
• Casing Length: 50 mm
• Visible Cable Length: 50 cm
• Stripped Cable Length: 70 mm
• Spectral Sensitivity: Approximately 600 nm
• Degree of Protection: IP40
• Operating Temperature: -20 C to +60 C
• Weight: Approximately 0.25 kg

Applications

• Supervision of yellow-burning oil flames in industrial and commercial burners
• Used in intermittent operation burner control systems
• Compatible with Siemens burner controls such as LAL, LME7, LMO, LMV, and LOA series
• Suitable for HVAC and boiler systems requiring reliable combustion safety monitoring