QRB1B-A017A25B Siemens Flame Sensor

Overview

The Siemens QRB1B-A017A25B is a high-sensitivity photoresistive flame detector designed for the supervision of yellow-burning oil flames. This compact sensor is engineered for intermittent operation and works by detecting the visible light spectrum of the flame. It features a soft plastic plug for simplified mounting directly into a burner hole, ensuring a secure and aligned fit. As a critical safety component, it is typically used in conjunction with Siemens burner controls to provide reliable flame monitoring in industrial and commercial heating systems.

Features

• High-sensitivity photoresistive element (red casing) for detecting yellow-burning oil flames
• Soft plastic plug design for easy push-in mounting without the need for additional flanges
• Integrated guide spring ensures correct alignment of the sensor toward the flame
• Compact 50mm housing length suitable for tight burner configurations
• Flexible 2-wire thermoplastic cable with stripped ends for easy wiring
• Selective spectral sensitivity (peaking at 600 nm) to prioritize visible light from oil flames

Specifications

• Model: QRB1B-A017A25B
• Sensitivity: High (Red casing)
• Housing Length: 50 mm
• Visible Cable Length: 17 cm
• Stripped End Length: 25 mm
• Spectral Sensitivity: Approximately 600 nm
• Protection Rating: IP40
• Operating Temperature: -20 C to +60 C
• Weight: Approximately 0.25 kg
• Mounting: Soft plastic plug with sealing and securing ribs

Applications

• Supervision of yellow-burning oil flames in intermittent operation
• Used with Siemens burner controls such as LAL, LME7, LMO, LMV, and LOA series
• Ideal for residential and industrial oil burners requiring high-sensitivity detection
• Frontal and lateral (90 degree) illumination monitoring in combustion systems