QRA2M(1) Siemens Detector

Overview

The Siemens QRA2M(1) is a high-sensitivity ultraviolet (UV) flame detector designed for the supervision of gas or oil flames and for ignition spark proving. This sensor monitors the intensity of UV radiation emitted by the burner flame during each half cycle, providing a signal current to the burner control system to ensure safe operation. It is specifically engineered for intermittent operation and features a robust, metallized plastic housing to prevent static charging from fan air flow.

Features

• High-sensitivity UV photodiode for reliable flame detection
• Integrated metallized plastic housing to eliminate static interference
• Supplied with a mounting flange and clamp for secure installation
• Designed for intermittent operation (not suitable for continuous use)
• IP40 protection rating for internal burner mounting
• Compatible with a wide range of Siemens burner controls, including the LMV, LME, and LFL series

Specifications

• Model: QRA2M(1)
• Sensitivity: High
• Operating Mode: Intermittent
• Average Life: Approximately 10,000 hours at 50 degrees Celsius
• Degree of Protection: IP40
• Mounting: Direct on burner with flange and clamp
• Terminal Cover: Green

Applications

• Supervision of gas and oil flames in industrial and commercial burner systems
• Ignition spark proving for automatic burner controls
• Integration into HVAC and boiler systems using Siemens burner control units
• Suited for environments where high-sensitivity flame monitoring is required for safety and efficiency