Balluff BES Q40KFU-PAC35E-S04G, also known as BES021H, is a 40×40×62 mm square inductive proximity sensor with a non-flush mounting style and a 35 mm sensing range, built for rugged metal-detection tasks in harsh environments. It provides a PNP normally open/normally closed switching output via an M12×1 connector and carries IP67 protection for dust and water exposure. Operating from a DC supply in the 10–30 V range, it typically draws about 200 mA when active. This factor-1 inductive sensor from the BES Q40KFU family is well-suited for automation, conveyors, and other industrial applications where reliable metal presence sensing is required.
