The W2 Flat photoelectric sensor family is enclosed in a housing only 3.5 mm high, enabling it to fit in nearly all machine parts for reliable object detection. These sensors, which are one of the smallest photoelectric sensor families in the world, enable thin and compact machine designs. Their rugged housing includes metal-reinforced fixing holes that simplify machine integration. This flat design enables even a milling recess to be used to integrate the sensor safely in the machine.