The Siemens QRB1B-A070B70A is the high-sensitivity, red-housing QRB1 configuration with a 50 mm body and 70 cm cable. Photoresistive sensing monitors visible yellow oil flames during intermittent burner operation.
Product Specification
- High sensitivity; red 50 mm detector housing.
- Fixed 70 cm cable with 70 mm stripped ends and ferruled conductors.
- Two-core stranded copper cable, 2 × 0.75 mm².
- Supplied without a soft mounting plug, flange or clamp.
- Frontal and 90-degree lateral flame viewing.
- IP40 protection.
- Safety class II; operating ambient temperature −20 to +60 °C.
- Maximum spectral sensitivity: approximately 600 nm.
Control Compatibility
Siemens lists QRB1 combinations with LAL, LME7, LMO, LMV and LOA control families for yellow oil-flame supervision. The selected burner control defines the detector sensitivity and permissible cable length.
Model Comparison
QRB1A-A070B70A: The QRB1A counterpart has normal sensitivity and a black housing, with the same housing and cable lengths.
Compare sensitivity, housing and cable options in the QRB1 series selection guide.
