The BALLUFF BCS M18BBI3-PSC80D-S04K is a capacitive proximity sensor with tubular design, featuring an 18mm diameter and 88.5mm body length. Constructed with polybutylene terephthalate housing, this PNP-type sensor offers normally open (N.O.) operation with 8mm sensing distance in flush mounting configuration. It operates at 100Hz switching frequency and has IP67 protection rating. The device comes with a 4-pin M12 quick-disconnect connector.