QRB1B-D025B40B Siemens Flame Sensor

Overview

The Siemens QRB1B-D025B40B is a compact, photoresistive flame detector designed for the supervision of yellow-burning oil flames in the visible light spectrum. This high-sensitivity sensor is engineered for use with Siemens burner controls in intermittent operation. It features a red housing for easy identification of its increased sensitivity and is equipped with a soft plastic plug for simplified mounting directly onto the burner.

Features

• Photoresistive light-sensitive element with a maximum spectral sensitivity of approximately 600 nm
• High sensitivity (indicated by the red casing color) to effectively detect visible light radiation from oil flames
• Integrated soft plastic plug design for secure, vibration-free mounting in a simple hole with a lateral groove
• Infused 2-wire thermoplastic cable with ferrules for reliable electrical connection
• Guide spring mechanism to ensure the correct alignment of the detector with the flame
• Durable compact design suitable for integration into original equipment manufacturer (OEM) burner systems

Specifications

• Model: QRB1B-D025B40B
• Sensitivity: Increased (High)
• Casing Length: 137 mm
• Visible Cable Length: 25 cm
• Stripped Length: 40 mm
• Connection Type: With plug and ferrules; without cable strain relief
• Protection Rating: IP40
• Operating Temperature: -20 C to +60 C
• Weight: Approximately 0.03 kg to 0.25 kg depending on configuration

Applications

• Supervision of yellow-burning oil flames in industrial and commercial burner systems
• Designed for use with Siemens burner controls including LAL, LME7, LMO, LMV, and LOA series
• Suitable for both frontal and lateral (90 degree) illumination mounting configurations
• Primarily used in intermittent burner operations where periodic safety shutdowns occur