QRA73.A17 Siemens Detector

Overview

The Siemens QRA73.A17 is a high-precision ultraviolet (UV) flame detector designed for the continuous supervision of gas or oil flames and for ignition spark proving. As a critical safety component within burner management systems, it features an integrated self-checking mechanism that ensures reliable flame detection by periodically verifying the sensor’s functionality. This detector is specifically engineered for use with Siemens LMV5 and LME7 burner controls, providing a robust solution for industrial and commercial combustion applications where safety and operational efficiency are paramount.

Features

• Integrated self-checking mechanism allows for continuous flame supervision without interruption
• Normal sensitivity UV photodiode optimized for detecting gas flames and blue or yellow burning oil flames
• Designed for seamless integration with Siemens LMV5 and LME7 burner management systems
• Durable construction suitable for harsh industrial environments with an IP65 protection rating
• Side-viewing design provides flexibility for various burner mounting and viewing configurations

Specifications

• Model: QRA73.A17
• Operating Voltage: AC 120 V (50/60 Hz)
• Detector Tube Length: 125 mm
• Sensitivity: Normal
• Power Consumption: Approximately 3.4 VA
• Net Weight: 0.680 kg (1.5 lbs)
• Protection Class: IP65
• Country of Origin: Germany

Applications

• Continuous or intermittent supervision of gas and oil flames in industrial burners
• Monitoring of ignition sparks in high-demand combustion systems
• Use in HVAC systems and boiler plants requiring LMV5 or LME7 burner controls
• Application in commercial heating environments where fail-safe flame detection is required