Photocell QRB1A-A070B70A

Siemens Photoresistive Flame Detector QRB1A-A070B70A

The Siemens QRB1A-A070B70A is a photoresistive flame detector used with Siemens burner controls for supervising yellow-burning oil flames in the visible light spectrum, tuned to a peak spectral sensitivity around 600nm. It carries a 70cm two-core stranded-copper cable with 70mm stripped ends for direct wiring, and mounts via a small or large flange with clamp, or a lateral groove plug, keeping installation flexible across burner types. Rated IP40 and built for -20°C to +60°C operation, it is used in intermittent-operation oil burner applications alongside control units such as the LAL, LME7, LMO, LMV and LOA series. It is an OEM-grade sensor built by Siemens for integration into burner and boiler flame-safety systems.