QRA2(1) Siemens Detector

Overview

The Siemens QRA2(1) is a normal sensitivity ultraviolet (UV) flame detector designed for the supervision of gas or oil flames and for ignition spark proving. This sensor is engineered for intermittent operation, typically used in conjunction with Siemens burner controls to ensure reliable flame monitoring in industrial and commercial burner applications. The unit features a compact, metallized plastic housing designed to prevent static charging from fan air flow and includes a securing flange and clamp for direct mounting to the burner.

Features

• Ultraviolet-sensitive photodiode detects radiation in the 190 to 270 nm range
• Normal sensitivity rating suitable for standard gas and oil flame supervision
• Self-contained unit includes a securing flange and clamp for easy installation
• Metallized plastic housing prevents static interference from air circulation
• Designed for intermittent operating modes
• Black terminal cover for easy identification of sensitivity type
• Compatible with a wide range of Siemens burner controls including LME, LFL, and LMV series

Specifications

• Model: QRA2(1)
• Sensitivity: Normal
• Spectral Range: 190 to 270 nm
• Degree of Protection: IP40
• Operating Temperature: -20 C to +60 C
• Average Life: Approximately 10,000 hours at 50 C
• Weight: Approximately 60g (0.13 lbs)
• Mounting: Direct burner mounting with flange and clamp
• Housing Material: Metallized plastic

Applications

• Supervision of gas flames in industrial burner systems
• Monitoring of yellow or blue-burning oil flames
• Ignition spark proving during burner startup sequences
• Integration into burner control systems for boilers and HVAC equipment
• Suitable for use by OEMs in the manufacturing of gas-fired equipment