QRA10M.C Siemens Sensor

Overview

The Siemens QRA10M.C is a high-sensitivity ultraviolet (UV) flame detector designed for the supervision of gas and oil flames, as well as for ignition spark proving. Housed in a rugged die-cast aluminum enclosure, this sensor is engineered to detect the UV radiation emitted by flames to generate a reliable flame signal. It is a critical safety component used in conjunction with Siemens burner controls to ensure secure and efficient combustion processes in industrial and commercial environments.

Features

• High-sensitivity UV cell for precise detection of gas and blue- or yellow-burning oil flames
• Rugged die-cast aluminum housing provides durability in harsh industrial settings
• Integrated 1-inch mounting coupling for secure attachment to viewing tubes
• Connection facility for cooling air to extend the life of the UV cell in high-temperature environments
• Dust and splash protection with an IP54 rating
• Swiveling shutter mechanism to protect the UV cell and facilitate self-checking (when used with compatible controls)
• Quartz-glass window to shield the detector tube and shutter from contaminants

Specifications

• Model: QRA10M.C
• Spectral Sensitivity: 190 to 270 nm
• Sensitivity Level: High
• Housing Material: Die-cast aluminum
• Average Life of UV Cell: Approximately 10,000 hours at a maximum of 50°C
• Operating Temperature: -20°C to +60°C
• Protection Rating: IP54
• Permissible Combustion Chamber Pressure: Max. 50 mbar
• Mounting Position: Optional/Any
• Weight: Approximately 740 g

Applications

• Supervision of gas flames and yellow- or blue-burning oil flames in industrial burners
• Ignition spark proving for reliable burner startup
• Integration with Siemens burner controls such as the LGB, LFL, and LME series
• Use in HVAC systems, commercial boilers, and industrial process heating
• Environments requiring high-sensitivity monitoring due to specific flame characteristics or mounting distances