QRB1B-A148B70B Siemens Flame Sensor

Overview

The Siemens QRB1B-A148B70B is a high-sensitivity photoresistive flame detector designed for the supervision of yellow-burning oil flames. It is used in conjunction with Siemens burner controls during intermittent operation to ensure safe combustion by monitoring the visible light spectrum of the flame. This compact sensor features a soft plastic plug for simplified mounting and is engineered for both frontal and lateral illumination, making it versatile for various industrial and commercial burner configurations.

Features

• High-sensitivity photoresistive element optimized for yellow-burning oil flames
• Integrated soft plastic plug for easy and secure press-fit installation into burner housings
• Designed for both frontal and lateral (90 degree) light entry to accommodate different mounting orientations
• Red casing color specifically indicates its high-sensitivity classification
• Infused 2-wire thermoplastic cable with ferrules for reliable electrical connections
• Reliable signal transmission with minimal loss when installed according to guidelines

Specifications

• Model: QRB1B-A148B70B
• Sensor Type: Photoresistive
• Sensitivity: High (Red casing)
• Casing Length: 50 mm
• Visible Cable Length: 148 cm
• Stripped End Length: 70 mm
• Spectral Sensitivity: Approximately 600 nm
• Protection Rating: IP40
• Operating Temperature: -20 C to +60 C
• Mounting Accessory: Soft plastic plug included

Applications

• Supervision of yellow-burning oil flames in commercial and industrial heating systems
• Used with Siemens burner controls including LAL, LME7, LMO, LMV, and LOA series
• Integration into burner systems by Original Equipment Manufacturers (OEMs)
• Suitable for systems requiring intermittent burner operation and visible light flame detection