QRB1A-A035B40A2 Siemens Flame Sensor

Overview

The Siemens QRB1A-A035B40A2 is a photoresistive flame detector designed for the supervision of yellow-burning oil flames in intermittent operation. This compact sensor is used in conjunction with Siemens burner controls to monitor flames in the visible light spectrum. It features a black casing indicating normal sensitivity and is engineered for reliable signal transmission in commercial and industrial burner applications.

Features

• Photoresistive sensing element optimized for the visible light spectrum (approx. 600 nm)
• Normal sensitivity with a black housing for clear identification
• Integrated 2-wire thermoplastic cable for simplified electrical connection
• Supplied with a large flange and clamp to ensure secure, vibration-free mounting
• Designed for both frontal and lateral (90 degree) illumination
• Compact design allows for installation in tight burner configurations

Specifications

• Model: QRB1A-A035B40A2
• Type: Photoresistive Flame Detector
• Sensitivity: Normal
• Casing Length: 50 mm
• Visible Cable Length: 35 cm
• Stripped Cable Length: 40 mm
• Operating Temperature: -20 C to +60 C
• Degree of Protection: IP40
• Accessories: Large mounting flange and clamp included

Applications

• Supervision of yellow-burning oil flames in burner systems
• Use with Siemens burner controls such as LAL, LME7, LMO, LMV, and LOA series
• Intermittent operation burner cycles in HVAC and boiler systems
• Industrial heating and thermal processing installations requiring safety flame monitoring