Balluff BES 516-207-S21-E (BES027U) is a flush‑mount, cylindrical inductive proximity sensor that measures 12 mm in diameter and 70 mm in length, with an M12x1 connection and a normally open output. It has a nominal sensing distance SN of 2 mm and is designed to detect metal targets without contact in confined industrial spaces. The unit accepts a wide operating voltage range of 20 to 250 V AC or DC and carries IP67 ingress protection, enabling use in dusty or washdown environments on conveyors, end‑of‑line switches, or automated tooling. This specific model is listed as discontinued by the manufacturer, with BES027U mapping to the BES 516‑207‑S21‑E family.
