QRA53.E17 Siemens Sensor

Overview

The Siemens QRA53.E17 is a high-performance ultraviolet (UV) flame detector designed for the continuous supervision of gas or oil flames and for ignition spark proving. Engineered for industrial environments, this self-checking sensor ensures maximum safety by monitoring the intensity of burner flame radiation and providing a constant signal to the control system. It is specifically designed to work with Siemens burner controls, such as the LGK16 and LGI16 series, and features a robust NEMA 4 rated housing to protect against water and dust ingress in demanding applications.

Features

• Self-checking mechanism allows for continuous flame supervision without interruption
• Normal sensitivity UV photodiode designed to detect gas flames and blue or yellow burning oil flames
• Integrated stepper motor and swiveling shutter system for periodic testing of the UV cell
• Durable NEMA 4 and IP65 rated housing ensures reliability in weatherproof and industrial environments
• Protective quartz-glass window prevents dirt ingress to the shutter and tube
• Designed for frontal illumination with a 125mm sleeve length

Specifications

• Model: QRA53.E17
• Mains Voltage: AC 100 V to 110 V (50/60 Hz)
• Detector Tube Length: 125 mm
• Sensitivity: Normal
• Protection Rating: IP65 / NEMA 4
• Operating Mode: Continuous
• Ambient Temperature Range: -20 C to +60 C
• Average Life of UV Cell: 10,000 hours (below 50 C)
• Replacement UV Cell: AGR4 502 4065 0
• Weight: Approximately 0.75 kg (1.65 lbs)

Applications

• Supervision of gas flames and yellow or blue burning oil flames in industrial burners
• Ignition spark proving in high-demand combustion systems
• Use with Siemens burner controls type LGK16 or LGI16
• Weatherproof and outdoor industrial installations requiring NEMA 4 protection
• Continuous or intermittent burner operations in HVAC and boiler systems