Capable of detecting miniature objects to millimeter precision, the F77 series from Peperl+Fuchs even identifies transparent or highly reflective objects due to its broad sound cone and high switching frequency of up to 50 Hz. Special evaluation electronics in the sensor provide a high degree of functional safety. Interference noise is reliably suppressed. High noise immunity allows the sensor to be seamlessly integrated into a wide range of applications. In addition to miniature housing, the sensor features a blind zone of just 10 mm. Three common versions as background suppression, retroreflective or a thru-beam sensor are available with large sensing ranges. The switching point is taught by the way of teach-in.