The BALLUFF BCS M12B4G2-PSC40D-S04K is a capacitive proximity sensor with tubular design, featuring a 12mm diameter and 75mm body length. Constructed with stainless steel housing, it offers PNP output configuration and normally open (N.O.) contact. The sensor provides 4mm sensing distance, flush mounting capability, and operates at 100Hz switching frequency. Rated IP67 for protection, it comes with a 4-pin M12 quick-disconnect connector.