A photoelectric sensor is disclosed that comprises a sensor unit having a casing. The casing includes one surface having a first display and a second display. The first display is structured and arranged to display a threshold value that may be set by an operator of the photoelectric sensor. The second...http://www.google.fr/patents/US6555806?utm_source=gb-gplus-shareBrevet US6555806 - Photoelectric sensor having special display features
Photoelectric sensor having special display features
