Photoresistance cell normal sensitivity QRB1 A 50

Photoresistance sensors for Siemens safety control panels for monitoring the visible spectrum of oil flames. The QRB1 A 50 is mainly used in connection with safety cabinets for oil burners in intermittent operation.
It is designed for front and side lighting (90°).

The maximum spectral sensitivity of the QRB1A50 is 600 nm, thus optimally integrating the maximum visible light range of the yellow-burning fuel oil flame. The usual provisions for flame safety remain unchanged, since the QRB1A50 can also detect parts of the light spectrum of other light sources (heating room lighting, sunlight etc.).