Photocell BPZ:QRB3(1)

Siemens Photoresistive Flame Detector QRB3(1)

The Siemens QRB3(1) 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. Housed in a rugged protective tube with a flange-and-clamp mount for easy fitting to the burner body, it is primarily 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.