QRB1B-B017A25B Siemens Flame Sensor

Overview

The Siemens QRB1B-B017A25B is a high-sensitivity, photoresistive flame detector designed for the supervision of yellow-burning oil flames. This compact sensor is part of the QRB series and is engineered to detect visible light radiation with a maximum spectral sensitivity of approximately 600 nm. It is primarily used in intermittent burner operations to ensure reliable flame monitoring and safety. The detector is built with a durable, red plastic housing and is capable of both frontal and lateral illumination, making it versatile for various burner mounting configurations.

Features

• High-sensitivity photoresistive element optimized for yellow-burning oil flames
• Red plastic casing for easy identification of sensitivity level
• Compact 50 mm housing length for flexible installation in tight spaces
• 2-wire thermoplastic cable for straightforward electrical connection
• Supports both frontal and lateral (90 degree) light entry for diverse mounting needs
• Designed for intermittent operation in industrial and commercial combustion systems
• Metallized housing options available to prevent static charge from fan airflow

Specifications

• Model: QRB1B-B017A25B
• Sensitivity: High (identified by red casing)
• Housing Length: 50 mm
• Visible Cable Length: 17 cm
• Stripped End Length: 25 mm
• Spectral Sensitivity: Maximum approximately 600 nm
• Protection Rating: IP40
• Operating Temperature: -20 C to +60 C
• Weight: Approximately 0.25 kg
• Mounting: Available with soft plastic plug or flange/clamp accessories

Applications

• Supervision of yellow-burning oil flames in heating and industrial burners
• Used in conjunction with Siemens burner controls such as LAL, LME7, LMO, LMV, and LOA series
• Suitable for integration into burner systems by Original Equipment Manufacturers (OEMs)
• Ideal for combustion monitoring in boilers and air heaters where stable flame detection is required