Siemens QRA2 Photocell is an authentic Siemens industrial component (Model/MPN: QRA2-UV-SENSOR) engineered for continuous factory operations and machinery maintenance in Kenya and across East Africa. Key verified ratings include Brand & Manufacturer: Siemens Building Technologies (Germany), Model Series: QRA2 Industrial UV Flame Detector, Detector Technology: Ultraviolet Photo Tube (UV Sensor). Standard plant applications include Industrial Gas & Dual Fuel Burner Supervision, Large Scale Steam & Power Generation Boilers, Rotary Cement & Lime Kiln Flame Monitoring. Held at our STARNEX counter on Enterprise Road, Nairobi Industrial Area for immediate collection or same-day dispatch. When requesting a quotation, please specify required quantity, operating voltage/phase, pipe connection size, and delivery destination.
Siemens QRA2 Photocell
Siemens QRA2 Photocell is an authentic Siemens industrial component (Model/MPN: QRA2-UV-SENSOR) engineered for continuous factory operations and machinery maintenance in Kenya and across East Africa. Key verified ratings include Brand & Manufacturer: Siemens Building Technologies (Germany), Model Series: QRA2 Industrial UV Flame Detector, Detector Technology: Ultraviolet Photo Tube (UV Sensor). Standard plant applications include Industrial Gas & Dual Fuel Burner Supervision, Large Scale Steam & Power Generation Boilers, Rotary Cement & Lime Kiln Flame Monitoring. Held at our STARNEX counter on Enterprise Road, Nairobi Industrial Area for immediate collection or same-day dispatch. When requesting a quotation, please specify required quantity, operating voltage/phase, pipe connection size, and delivery destination.
Functional engineering application
The Siemens QRA2 UV Flame Detector is a high-performance ultra-violet (UV) flame sensor manufactured by Siemens Building Technologies (Germany) for monitoring gas, oil, or dual-fuel industrial burners. Utilizing a high-purity UV-sensitive photo tube, the QRA2 detects shortwave ultraviolet radiation (190 nm to 270 nm) emitted exclusively by gas and oil flames. Because it reacts only to UV radiation and is completely blind to glowing refractory brickwork or hot metal walls, it prevents dangerous false-flame signals in high-temperature furnaces. Housed in a rugged die-cast aluminium casing with a mounting flange and clamp, the QRA2 is specified for Siemens LFL, LFE, LFA, LGB, and LME burner control boxes across industrial steam boilers, power plants, and rotary kilns.
Industrial UV flame detector sensor for gas and oil burners with Siemens LFL, LFA, LGB, and LME burner control boxes.
Quotation & fulfilment
Parametric technical attributes
| Siemens QRA2-UV-SENSOR | |
| IDENTIFICATION | |
| Component Type | Siemens QRA2 Photocell |
| Manufacturer / Brand | Siemens |
| Part Number (MPN) | QRA2-UV-SENSOR |
| Stock Keeping Unit (SKU) | STX-PCL-QRA2-046 |
| TECHNICAL PARAMETERS | |
| Brand & Manufacturer | Siemens Building Technologies (Germany) |
| Model Series | QRA2 Industrial UV Flame Detector |
| Detector Technology | Ultraviolet Photo Tube (UV Sensor) |
| Spectral Sensitivity | 190 nm - 270 nm (UV-C Spectrum) |
| Compatible Control Boxes | Siemens LFL1, LFE1, LFA1, LGB22, LME7, LMG22 |
| Protection Class | IP54 (Dust & Splash Proof) |
| Mounting Style | Frontal / Lateral Sight Tube Mounting |
| Weight | 0.18 kg |
| Country of Manufacture | Germany |
| PERFORMANCE & RATINGS | |
| Operating Voltage | 230V AC / 50Hz (Supplied via Control Box) |
| Operating Temperature Range | -20°C to +60°C (-4°F to +140°F) |
| CONSTRUCTION & CONNECTION | |
| Detector Housing Material | Die-Cast Aluminium with Clamping Ring |
| COMPLIANCE & LOGISTICS | |
| Stock Availability | On request |
System fitment & verified replacements
Interchangeable models
Commonly installed on equipment from
Common questions on this part
The QRA2 detects shortwave ultraviolet (UV) radiation (190 to 270 nm) emitted by gas, oil, and dual-fuel flames.
No, the QRA2 UV tube is blind to daylight, incandescent light, and red-hot refractory bricks, preventing false flame signals.
Works with Siemens LFL1, LFE1, LFA1, LGB22, LME7, and LMG22 control boxes.
It features an IP54 dust and splash-proof die-cast aluminium housing.
Yes, like all UV detector tubes, the internal gas tube has an operational life of ~10,000 hours and should be tested annually.
It mounts onto a sight tube aimed directly at the flame root using its integral clamping flange.
Manufactured by Siemens Building Technologies in Germany.
Yes, it is the primary UV flame scanner used on commercial LPG, natural gas, and dual-fuel burners in Kenya.
Yes, STARNEX holds dedicated counter stock of Siemens QRA2 detectors in Nairobi Industrial Area.
Operates reliably from -20°C to +60°C (-4°F to +140°F).
