The Siemens QRC1 Flame Sensor & Detector is a UV-sensitive flame detector used for monitoring blue-flame or yellow-flame oil and gas burners in industrial combustion systems. It detects ultraviolet radiation emitted by burner flames and sends a signal to the burner control system to confirm flame presence during burner operation.

The detector is designed primarily for intermittent burner operation in small to medium-capacity industrial burners, where accurate flame monitoring is essential for safe combustion control.

The QRC1 features a UV-sensitive diode with a quartz glass lens, which concentrates flame radiation onto the detector element. A built-in filter eliminates longer wavelengths so that the sensor only responds to the UV radiation produced by real flames.

With its integrated signal pre-amplifier and compact construction, the detector provides stable flame signals and reliable burner operation even in environments with flickering flames.

The QRC1 flame detector is widely used with Siemens burner control systems such as LMO, LME, LAL, and LMV series controllers, making it suitable for industrial boilers, furnaces, and process heating equipment.

Key Features

• Designed for oil and gas industrial burners

• High-sensitivity UV diode flame detection

• Detects blue or yellow burner flames

• Integrated preamplifier for stable flame signal output

• Compact design for easy burner installation

• Suitable for frontal or lateral flame viewing

• Compatible with Siemens burner control units

• Reliable flame monitoring for improved burner safety

• Durable design for industrial environments

Applications

• Industrial gas burners

• Industrial oil burners

• Dual-fuel combustion systems

• Steam boiler burners

• Industrial furnaces and ovens

• Thermal oil heaters

• Process heating equipment

Why Choose Siemens QRC1 Flame Detector?

• Reliable Siemens combustion safety technology

• Accurate UV flame detection for burner monitoring

• Compatible with multiple Siemens burner controllers

• Compact design for easy integration in burner systems

• Stable operation even with flickering flames

• Long service life with minimal maintenance

Technical Description

The Siemens QRC1 Flame Detector uses a UV-sensitive semiconductor diode that detects ultraviolet radiation emitted by burner flames. The radiation is concentrated by a quartz glass lens onto the diode’s active surface, generating an electrical signal that indicates flame presence.

An integrated electronic preamplifier amplifies the flame signal to the level required by the burner control system. This ensures stable detection and reliable burner operation even when flame intensity fluctuates.

The detector is designed for frontal or lateral illumination, allowing flexible installation depending on the burner design.

When connected to a burner controller, the QRC1 continuously monitors the burner flame. If the flame signal is lost, the burner control system immediately initiates a safety shutdown to prevent unsafe combustion conditions.

Technical Specifications