QRB1B-B027A25A Siemens Flame Sensor

Overview

The Siemens QRB1B-B027A25A is a high-sensitivity photoresistive flame detector designed for the supervision of oil flames in the visible light spectrum. This compact sensor is specifically engineered to detect yellow-burning oil flames and is primarily used in conjunction with Siemens burner controls for intermittent operation. Its design allows for reliable flame monitoring by measuring visible light radiation, ensuring safety and efficiency in combustion systems.

Features

• High-sensitivity photoresistive element optimized for visible light detection
• Specifically designed for the supervision of yellow-burning oil flames
• Compatible with a wide range of Siemens burner controls, including LAL, LME7, LMO, LMV, and LOA series
• Suited for both frontal and lateral (90-degree) illumination
• Compact design with integrated 2-wire thermoplastic cable for easy installation
• Maximum spectral sensitivity of approximately 600 nm to align with oil flame radiation

Specifications

• Model: QRB1B-B027A25A
• Sensitivity: High
• Casing Length: 50 mm
• Visible Cable Length: 27 cm
• Stripped Cable Length: 25 mm
• Protection Rating: IP40
• Operating Temperature: -20 C to +60 C
• Connection Type: 2-wire cable with cable termination (without plug)
• Weight: Approximately 20 to 35 grams

Applications

• Supervision of oil flames in industrial and commercial burner systems
• Monitoring yellow-burning oil flames in intermittent burner operations
• Used in boilers, heaters, and furnaces requiring visible light flame detection
• Integration into burner units by original equipment manufacturers (OEMs)
• Replacement part for maintenance of existing Landis & Staefa or Siemens combustion systems