Siemens QRB3 Photocell is an authentic Siemens industrial component (Model/MPN: QRB3-FLAME-PHOTO) 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: QRB3 Industrial Photoresistive Flame Cell, Sensor Technology: Photoresistive (CdS Cadmium Sulfide Cell). Standard plant applications include Siemens LAL / LFL Industrial Oil Burner Supervision, Large Scale Steam Boilers & Power Plants, Tea & Coffee Estate Main Boilers. 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 QRB3 Photocell
Siemens QRB3 Photocell is an authentic Siemens industrial component (Model/MPN: QRB3-FLAME-PHOTO) 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: QRB3 Industrial Photoresistive Flame Cell, Sensor Technology: Photoresistive (CdS Cadmium Sulfide Cell). Standard plant applications include Siemens LAL / LFL Industrial Oil Burner Supervision, Large Scale Steam Boilers & Power Plants, Tea & Coffee Estate Main Boilers. 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 QRB3 Photocell is a heavy-duty industrial photoresistive flame detector designed by Siemens Building Technologies for large forced-draft oil burners, multi-stage boilers, and industrial heating furnaces. Housed in a protective metal casing with an extra-long sight tube interface, the QRB3 is specifically engineered to operate with Siemens LAL, LFL, LOK, and LAE industrial burner control sequences. Its high-gain photoresistive element monitors yellow oil flames across long combustion chambers, providing dependable, fail-safe flame supervision that instantly shuts down heavy oil pumps and solenoid valves upon flame extinction.
Heavy-duty industrial photoresistive yellow flame detector photocell for Siemens LAL, LFL, and LOK industrial oil burner control systems.
Quotation & fulfilment
Parametric technical attributes
| Siemens QRB3-FLAME-PHOTO | |
| IDENTIFICATION | |
| Component Type | Siemens QRB3 Photocell |
| Manufacturer / Brand | Siemens |
| Part Number (MPN) | QRB3-FLAME-PHOTO |
| Stock Keeping Unit (SKU) | STX-PCL-QRB3-049 |
| TECHNICAL PARAMETERS | |
| Brand & Manufacturer | Siemens Building Technologies (Germany) |
| Model Series | QRB3 Industrial Photoresistive Flame Cell |
| Sensor Technology | Photoresistive (CdS Cadmium Sulfide Cell) |
| Spectral Range | 400 nm - 700 nm (Visible Yellow Flame Spectrum) |
| Compatible Control Boxes | Siemens LAL1, LAL2, LFL1, LOK16, LAE1 |
| Cable Length | 500 mm Heat-Resistant Lead Wires |
| Protection Rating | IP40 / NEMA 1 |
| Weight | 0.08 kg |
| Country of Manufacture | Germany |
| PERFORMANCE & RATINGS | |
| Operating Voltage | 230V AC / 50Hz (via Control Box) |
| Operating Temperature | -20°C to +60°C (-4°F to +140°F) |
| CONSTRUCTION & CONNECTION | |
| Housing Material | Heavy Duty Metal / Aluminium Protective Shell |
| COMPLIANCE & LOGISTICS | |
| Stock Availability | On request |
System fitment & verified replacements
Interchangeable models
Commonly installed on equipment from
Common questions on this part
The QRB3 is specifically designed for Siemens LAL1, LAL2, LFL1, LOK16, and LAE1 industrial control boxes.
It detects visible yellow light (400 to 700 nm) produced by oil and light fuel combustion.
QRB3 features a heavy-duty metal housing and electrical characteristics matched for industrial LAL/LFL controllers, whereas QRB1 fits smaller LMO/LME series.
Yes, the metal shell protects the internal CdS cell from high ambient temperatures near burner blast tubes.
Remove the sensor from the sight tube and wipe the glass front gently with a clean dry cloth.
Manufactured by Siemens Building Technologies in Germany.
Yes, STARNEX maintains counter stock of Siemens QRB3 photocells at our Nairobi Industrial Area warehouse.
It includes 500 mm heat-resistant flexible connection leads.
Operates reliably between -20°C and +60°C.
Yes, provided the flame produces visible yellow light and the control box is Siemens LAL or LFL.
