The BES M12EE-PSC40B-S04G is an inductive proximity sensor with 12mm diameter and M12 threaded design, featuring flush mount installation. It offers a 4mm sensing range, PNP output, normally open configuration, and operates at 2000Hz frequency. Constructed with stainless steel housing, it includes a 4-pin M12 male connector and works within 10-30VDC power range. Suitable for temperatures from -25 to 85°C with IP68 protection rating.