QRB3(1) Siemens Flame Detector

Overview

The Siemens QRB3(1) is a photoresistive flame detector designed for the supervision of yellow-burning oil flames in the visible light spectrum. It is primarily used with Siemens burner controls for small to medium-capacity burners operating in intermittent cycles. This specific model features a metal protective tube and is supplied with a securing flange and clamp to ensure precise, vibration-free alignment toward the flame.

Features

• Photoresistive sensing element with maximum spectral sensitivity at approximately 600 nm
• Normal sensitivity rating, identified by a black casing
• Integrated metal protective tube with a 17 mm external diameter
• Includes a metal securing flange and clamp for stable mounting
• Designed for both frontal and lateral (90 degree) illumination
• Durable construction suitable for industrial environments

Specifications

• Model: QRB3(1)
• Sensing Type: Photoresistive
• Sensitivity: Normal
• Spectral Sensitivity: Approximately 600 nm
• Protection Rating: IP40
• Operating Temperature: -20 C to +60 C
• Weight: Approximately 35 g (without cable)
• Mounting: Small flange and clamp included

Applications

• Supervision of yellow-burning oil flames in industrial and commercial burners
• Used in connection with Siemens burner controls such as LAL, LME7, LMO, LMV, and LOA series
• Suitable for intermittent burner operation
• Ideal for OEMs integrating flame detection into small capacity burner products