The QRA2 UV flame sensor detects ultraviolet light from burner flames.
Use it with controls designed for QRA sensors.
What is a qra2 uv flame sensor?
Burners need a spark to light and a sensor to prove the flame. Ignition electrodes carry the spark from the transformer into the fuel spray. Photocells such as the Siemens QRB series see the light of an oil flame, and UV sensors such as the QRA2 see ultraviolet light from the flame.
If the sensor cannot see the flame, the control box locks the burner out. Therefore, keep sensors clean and use the type the control box expects.
Further reading
- Flame detectors (Wikipedia)
- Photoresistors (Wikipedia)
- Spark ignition (Wikipedia)
Key terms explained
- Photocell
- A light-sensitive flame detector for oil burners.
- UV flame sensor
- A detector that responds to ultraviolet light from flames.
- Electrode gap
- The distance between electrode tips where the spark jumps.
- Electrode holder
- The bracket that positions the electrodes.
Features and benefits
- QRB1, QRB3, QRB4 and QRA2 detectors.
- Riello, Beckett and 40 series photocells.
- Electrodes for Riello, Baite, Saacke and Nuway.
- Electrode holders.
Technical specifications
| Product | UV flame sensor |
|---|---|
| Model | QRA2 |
| Packing | Confirm with quote |
| Supplier | Sparks Plumbing Experts Ltd, Nairobi |
| Supplier | Sparks Plumbing Experts Ltd, Nairobi |
Sizes, grades and ratings depend on stock and model. Tell us what you need, and we will confirm before you order.
Applications of a qra2 uv flame sensor
- Riello G series. Electrodes 185 mm and 220 mm.
- Riello RL series. RL electrodes.
- Baite BT14. BT14 electrodes.
- Saacke burners. Saacke electrodes.
- Nuway burners. Electrode holders.
- Siemens controls. QRB and QRA detectors.
- Annual service. Electrode replacement.
- Lockout repairs. Photocell replacement.
How to choose and install
- Match the detector type to the control box.
- Set electrode gaps to the manual.
- Clean photocells at every service.
- Replace cracked electrode porcelain.
Why choose Sparks Plumbing Experts
- Burners and their sparesNozzles, photocells, electrodes and fittings are stocked alongside the burners they serve.
- Well-known burner brandsOur range includes Riello burners, plus Danfoss and Steinen nozzles.
- Boiler room accessoriesGauges, controls and boiler accessories help you keep heating plant running.
- Nozzle selection helpSend your boiler details, and we help you choose the right nozzle size and angle.
- Visit or collect in NairobiOur store is at KCB Building, Enterprise Road, in the Industrial Area, so you can see parts before you buy or collect your order.
- Quotes your wayAsk for prices by phone, WhatsApp, email or the online quote form, whichever suits you on site.
- Over 1,600 products in one placeOur catalogue covers 55 categories, so one supplier can handle most of your parts list.
- Help choosing the right partSend a nameplate photo, a drawing or the old part, and we help you match size and specification.
- Single items or project quantitiesWe price a single replacement part just as readily as a full site order.
- Supply across East AfricaWe serve customers across Kenya, and we also supply buyers in Uganda and Tanzania.
Related products and accessories
Browse more: Control Box · Photocells · Electrodes · Solenoids · Burner fittings · Burners.
Ordering from Sparks Plumbing Experts
We supply customers across Kenya, and we also serve buyers in Uganda and Tanzania. You can collect from our store at KCB Building, Enterprise Road, Nairobi, or ask us about delivery to your site. Send your quantities and specifications, and we will reply with prices and availability.
Request a Quote WhatsApp 0726 086 895
Frequently asked questions
What details do you need to quote flame parts?
Tell us the model number and quantity. A photo of the old part, a nameplate or a drawing also helps. Then call or WhatsApp 0726 086 895, or use the quote form on this page.
Do you deliver flame parts outside Nairobi?
Yes. We supply customers across Kenya, and we also serve buyers in Uganda and Tanzania. Delivery or courier arrangements are agreed when you confirm the order.
How much does a flame part cost in Kenya?
The price depends on the item, size or model and the quantity. Therefore, send your list with a quote request and we will reply with current figures.
Which photocell do I need?
The one your control box is designed for, such as QRB1, QRB3 or QRB4.
Why does a dirty photocell cause lockout?
It cannot see the flame, so the control box shuts down.
How long are Riello G electrodes?
185 mm for G3, G5 and G10; 220 mm for G20, as listed.
Do electrodes wear out?
Yes. Tips erode and porcelain can crack.
Is QRA2 for oil or gas?
It is a UV sensor used on gas and some oil burners.
People also search for
qrb vs qra flame detector
QRB photocells see visible light; QRA sensors see UV.
riello g20 electrode
220 mm electrodes are listed.
burner electrode gap setting
Follow the burner manual.
photocell cleaning
Wipe the window at each service.
burner not detecting flame
Dirty or failed photocell, or wrong type.
Flame parts price in Kenya
Prices change with size, model and quantity. Request a quote from Sparks Plumbing Experts for current figures.
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