Overview
The Siemens QRA53.G17 is a high-sensitivity ultraviolet (UV) flame detector designed for the continuous supervision of gas flames, yellow or blue-burning oil flames, and ignition spark proving. Engineered for industrial environments, this self-checking sensor ensures high-level safety by providing reliable flame detection for high-demand burner cycles. It is specifically designed to work in conjunction with Siemens burner controls, such as the LGK16 and LGI16 series, and features a durable die-cast aluminum housing suitable for demanding applications.
Features
- Designed for continuous operation with integrated self-supervision for enhanced safety
- High-sensitivity UV cell provides rapid and accurate detection of various fuel flames
- NEMA 4 and IP65 rated housing offers protection against water, dust, and corrosion
- Integrated stepper motor and shutter system facilitate periodic self-testing of the UV cell
- Equipped with a 1-inch mounting coupling and facilities for cooling air connection
- Durable die-cast aluminum construction with a quartz-glass window to protect against dirt
Specifications
- Model: QRA53.G17
- Power Supply: AC 100 V to 110 V (50/60 Hz)
- Detector Tube Length: 125 mm
- Sensitivity: High
- Protection Rating: IP65 / NEMA 4
- Operating Temperature: -20 C to +60 C
- Weight: Approximately 1.58 lbs (0.717 kg)
- Replacement Part: Uses AGR4 502 4065 0 spare UV tube
Applications
- Supervision of gas and oil flames in industrial and commercial burner systems
- Continuous or high-demand burner operations requiring self-checking safety protocols
- Use with Siemens LGK16 or LGI16 burner control systems
- Ignition spark proving for gas-fired equipment and industrial ovens
- Suitable for harsh environments including boiler rooms, chemical processing plants, and HVAC systems



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