Siemens RAR Series
Infrared Flame Detectors for Oil Burner Systems. Specialized IR sensing for stable oil flame supervision.
Series Overview
The Siemens RAR Series is a family of infrared (IR) flame detectors designed primarily for oil-fired burner applications. Unlike visible light (photoresistive) or ultraviolet (UV) detection systems, RAR flame detectors operate by sensing infrared radiation emitted by oil combustion flames. This detection method provides stable flame supervision in applications where visible light detection may be unreliable.
The RAR Series is widely used in oil burner systems where robust flame verification is required under variable combustion conditions.
Detection Principle
Oil flames emit a strong infrared radiation spectrum. The RAR Series detects this radiation and transmits a signal to the burner control unit to confirm stable combustion.
- Flame Presence: Infrared radiation intensity increases.
- Signal Generation: Detector output stabilizes.
- Verification: Burner control unit allows fuel supply.
- Safety Shutdown: Immediate interruption if radiation disappears.
IR detection is particularly effective in oil combustion environments where soot and luminosity characteristics differ from gas flames.
Typical Applications
RAR Series flame detectors are commonly used in:
- Oil-fired burners
- Light and heavy oil combustion systems
- Industrial heating systems
- Commercial boiler applications
- Oil-based process heating equipment
They are typically integrated with compatible Siemens burner control units for structured safety supervision.
Infrared Sensing
Specifically tuned to detect the IR spectrum emitted by oil combustion flames.
Robust Safety
Ensures reliable shutdown if flame radiation drops below the safety threshold.
Core Functional Characteristics
All RAR Series flame detectors share the following features:
- Infrared radiation sensing
- Optimized for oil flame characteristics
- Fast flame-on and flame-off response
- Compact industrial housing
- Designed for continuous burner operation
The detector continuously monitors flame radiation and ensures automatic safety shutdown in case of flame failure.
Model Differentiation Within the RAR Series
RAR models may vary depending on:
- Mounting configuration
- Electrical connection type
- Cable length
- Protection class
- Application compatibility
These variations allow flexible installation depending on burner design and control system requirements.
RAR Series Variants
| Model | Typical Application | Detection Type | Notes |
|---|---|---|---|
| RAR7 | Oil Burner Systems | Infrared | Standard oil burner detection |
| RAR8 | Industrial Oil Burner | Infrared | Enhanced sensitivity version |
Model selection should consider burner capacity, installation geometry, and compatible burner control unit.
Integration & System Compatibility
RAR Series flame detectors are commonly integrated with:
- Siemens oil burner control units
- Compact burner management systems
- Oil-fired commercial heating systems
- Industrial oil combustion assemblies
Correct installation angle and flame visibility are essential for stable operation.
Positioning Within Siemens Flame Detection Systems
- QRB Series: Visible light detection (compact gas / light oil)
- RAR Series: Infrared detection (oil burners)
- QRA Series: Ultraviolet detection (industrial gas & oil)
RAR occupies the technical position optimized specifically for oil flame detection where IR sensing provides enhanced stability.
Selection Guide
Use RAR7 for standard oil burner flame detection.
Select RAR8 for applications requiring higher sensitivity.
Ensure direct line-of-sight to the flame for proper IR reception.