QRB1B-D022X20B Siemens Flame Sensor

Overview

The Siemens QRB1B-D022X20B is a compact, photoresistive flame detector designed for the supervision of yellow-burning oil flames. Engineered for use with Siemens burner controls, this high-sensitivity sensor is primarily used in intermittent operation for industrial and commercial heating systems. It features a specialized photoresistive element that detects radiation in the visible light spectrum, ensuring reliable flame monitoring and safety by preventing the continued flow of fuel in the absence of a flame.

Features

• High-sensitivity photoresistive element optimized for the maximum visible light radiation of yellow-burning oil flames
• Compact design with an integrated 2-wire thermoplastic cable
• Suitable for both frontal and lateral (90 degree) illumination, offering flexible mounting options
• Integrated soft plastic plug for simplified installation into a burner hole with a lateral groove
• Sealing and securing ribs ensure the detector remains firmly seated during operation
• Guide spring ensures correct alignment of the sensor toward the flame for consistent signal transmission

Specifications

• Model: QRB1B-D022X20B
• Sensitivity: High (Red casing)
• Casing Length: 50 mm
• Visible Cable Length: 22 cm
• Stripped Length: 20 mm
• Spectral Sensitivity: Approximately 600 nm
• Protection Rating: IP40
• Operating Temperature: -20 C to +60 C
• Weight: Approximately 0.25 kg

Applications

• Supervision of yellow-burning oil flames in commercial and industrial burner systems
• Use in conjunction with Siemens burner controls such as LAL, LME7, LMO, LMV, and LOA series
• Integration into oil-fired package burners, boilers, and furnaces
• Ideal for intermittent burner operations requiring reliable, high-sensitivity flame detection