Pepperl+fuchs Phototalk

Divergent mode sensors and clear object retroreflective sensors are two photoelectric sensor types used to detect clear or opaque objects.  Divergent sensors have a wide light spot that spreads out over the object rather than burning through the clear or opaque objects.  Clear object retroreflective sensors are taught the light level to a reflector with no object present.  A special low hysteresis circuit in the sensor detects small changes in the light level when a clear or opaque object is present. --Divergent sensors have a much larger light spot compared to a standard diffuse type --Many clear object retroreflective sensors have 3 adjustable contrast or sensitivity levels --Clear object retroreflective sensors can function just like a standard polarized retroreflective sensor