Contrast sensors are high-resolution light sensors that differentiate objects according to their gray values. The robust contrast sensors from Balluff can detect even small differences in contrast, have a high switching frequency of up to 30 kHz and are therefore particularly fast. They enable high positioning accuracy and are therefore suitable for a wide range of applications, for example in the printing and packaging industries. Contrast sensor, light transmitter=LED, connection type=cable, switching output=PNP normally open (NO), PNP normally closed (NC) pins 4-2, range max.=12 mm