Siemens QRB4B Photocell is an authentic Siemens industrial component (Model/MPN: QRB4B-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 Code: QRB4B Compact Flame Detector, Sensor Technology: Photoresistive (Enhanced CdS / Semi-Conductor). Standard plant applications include Siemens LMV / LME Modulating Burner Supervision, Low-NOx Commercial Boilers & Water Heaters, Tea & Coffee Estate Processing Plants. 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 QRB4B Photocell
Siemens QRB4B Photocell is an authentic Siemens industrial component (Model/MPN: QRB4B-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 Code: QRB4B Compact Flame Detector, Sensor Technology: Photoresistive (Enhanced CdS / Semi-Conductor). Standard plant applications include Siemens LMV / LME Modulating Burner Supervision, Low-NOx Commercial Boilers & Water Heaters, Tea & Coffee Estate Processing Plants. 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 QRB4B Photocell is an advanced compact flame detector engineered by Siemens Building Technologies (Germany) for modern micro-processor burner management systems such as the Siemens LMV2, LMV3, LME7, and LMO series. Featuring enhanced spectral sensitivity capable of monitoring both yellow oil flames and blue-burning low-NOx flames, the QRB4B delivers ultra-fast flame detection response (< 0.8 seconds) and precise signal transmission to digital combustion managers. Equipped with a compact plug-in housing, integrated clamping spring, and high-flex heat-resistant cable, the QRB4B ensures optimal safety supervision across modern commercial boilers, modulating burners, and industrial heat processing units.
Compact yellow and blue flame detector photocell for Siemens LMV and LME digital burner management systems.
Quotation & fulfilment
Parametric technical attributes
| Siemens QRB4B-FLAME-PHOTO | |
| IDENTIFICATION | |
| Component Type | Siemens QRB4B Photocell |
| Manufacturer / Brand | Siemens |
| Part Number (MPN) | QRB4B-FLAME-PHOTO |
| Stock Keeping Unit (SKU) | STX-PCL-QRB4B-050 |
| TECHNICAL PARAMETERS | |
| Brand & Manufacturer | Siemens Building Technologies (Germany) |
| Model Code | QRB4B Compact Flame Detector |
| Sensor Technology | Photoresistive (Enhanced CdS / Semi-Conductor) |
| Spectral Range | 380 nm - 720 nm (Yellow & Blue Flame Spectrum) |
| Compatible Control Boxes | Siemens LMV2, LMV3, LME7, LME21, LMO14, LMO24 |
| Response Time | < 0.8 Seconds (Ultra Fast) |
| Cable Length | 500 mm Heat-Resistant Shielded Lead |
| Protection Rating | IP40 / NEMA 1 |
| Weight | 0.03 kg |
| Country of Manufacture | Germany |
| PERFORMANCE & RATINGS | |
| Operating Voltage | 230V AC / 50Hz (via Digital Control Box) |
| Operating Temperature | -20°C to +60°C (-4°F to +140°F) |
| COMPLIANCE & LOGISTICS | |
| Stock Availability | On request |
System fitment & verified replacements
Interchangeable models
Commonly installed on equipment from
Common questions on this part
QRB4B has a wider spectral range (380-720 nm) capable of sensing both yellow oil flames and blue low-NOx flames, and features an ultra-fast < 0.8s response time for LMV digital managers.
Compatible with Siemens LMV2, LMV3, LME7, LME21, LMO14, and LMO24 digital burner control systems.
Yes, its enhanced semi-conductor element senses the blue spectrum of low-NOx oil and gas burners.
It has an ultra-fast response time of less than 0.8 seconds.
It clips directly into a blast tube mounting bracket aimed at the burner flame root.
Manufactured by Siemens Building Technologies in Germany.
Yes, STARNEX stocks genuine Siemens QRB4B photocells at our Nairobi branch.
It comes with a 500 mm heat-resistant shielded lead cable.
Operates from -20°C to +60°C (-4°F to +140°F).
Wipe the optical tip gently with a clean dry cotton swab or microfiber cloth.
