QRA10.C Siemens Detector

Overview

The Siemens QRA10.C is a normal-sensitivity ultraviolet (UV) flame detector designed for the supervision of gas or oil flames and for ignition spark proving. Housed in a durable die-cast aluminum casing, this sensor is engineered for intermittent operation in industrial and commercial burner systems. It works by detecting the UV radiation emitted by a flame to generate a flame signal, ensuring reliable monitoring while remaining insensitive to glowing firebrick, daylight, or boiler room lighting.

Features

• Normal sensitivity UV-sensitive cell designed for gas and oil flame detection
• Durable die-cast aluminum housing provides robust protection for industrial environments
• Integrated 1-inch mounting coupling and connection facility for cooling air
• Bayonet fitting allows for easy attachment to mounting couplings or glass holders
• IP54 protection rating to prevent ingress of dust and splashing water
• Designed for intermittent operating modes with various Siemens burner controls

Specifications

• Model: QRA10.C
• Sensing Type: Ultraviolet (UV)
• Sensitivity: Normal
• Spectral Response: 190 to 270 nm
• Housing Material: Die-cast aluminum
• Protection Rating: IP54 (IP65 achievable with AGG08)
• Weight: Approximately 0.74 kg (1.6 lbs)
• Ambient Temperature Range: -20 C to +60 C
• Average Life of UV Cell: 10,000 hours at 50 C
• Maximum Combustion Chamber Pressure: 50 mbar

Applications

• Supervision of gas flames and yellow or blue-burning oil flames
• Ignition spark proving in burner systems
• Use in combination with Siemens burner controls such as LFL, LFE1, LMG, and LME series
• Integration into industrial and commercial package burners and boilers