Siemens / HVAC / Sensor
Siemens QRA4.U
Industrial burner flame supervision; not a fire-alarm detector.
| Field | Value |
|---|---|
| Product Type | UV flame detector for gas or oil burners |
| Spectral Range | 190–270 nm |
| UV Cell Life | Approx. 10,000 h at max. 50 °C |
| Combustion Chamber Pressure | 150 mbar maximum |
| Protection | IP54 when mounted |
| Operating Temperature | -20 to 60 °C |
| Humidity | <95% RH |
| Connecting Wires | Approx. 1.8 m |
| Mounting Thread | 3/4-14 NPSM |
| Weight | Approx. 180 g |
| Est. Year Mfr | 2008 |
Refer to the manufacturer documentation for installation requirements and current product information.