UV/IR Flame Detector
Siemens QRA2
The Siemens QRA2 (series QRA2 / QRA2.9 / QRA2M, plus QBE61.1-P10) is a high-sensitivity flame detector combining UV (200-280 nm) and IR (4.4-4.7 um) sensing for marine and heavy-industrial burners. With T90 response under 20 ms and ATEX/IECEx certification, it provides fast, false-alarm-resistant flame failure protection.
UV + IR
T90 < 20 ms
ATEX / IECEx
Marine-grade
4-20 mA / Modbus
Why buyers choose it
- Dual UV/IR sensing rejects sunlight and welding-arc false alarms.
- Sub-20 ms response for fast flame-failure shutdown.
- ATEX/IECEx certified for hazardous areas.
- Analog + digital outputs for PLC/SCADA integration.
Specifications
| Model | Siemens QRA2 (QRA2.9 / QRA2M / QBE61.1-P10) |
|---|---|
| Detection | UV 200-280 nm + IR 4.4-4.7 um |
| Response | T90 < 20 ms |
| Certification | ATEX, IECEx, FM, SIL, DNV/ABS (marine) |
| Range | -40 C to +120 C |
| Output | 4-20 mA analog + Modbus / HART, fault & fire relays |
Applications
Marine engines and shipboard boilers.
Industrial boilers, refineries and incinerators.
Buyer Questions
Siemens QRA2 FAQs
What sensing does the Siemens QRA2 use?
It combines UV (200-280 nm) and IR (4.4-4.7 um) detection with T90 response under 20 ms, per the Siemens-listed product page.
Is it certified for hazardous areas?
Yes - ATEX and IECEx certified, with marine classifications DNV/ABS.
What outputs does it provide?
4-20 mA analog plus Modbus/HART, with dedicated fault and fire-alarm relays for PLC/SCADA.
Request a quote for QRA2
You may also like
