Balluff BESQ40KUUPU20BKN05 Inductive Proximity Sensor

Balluff BES Q40KU-UPU20B-KN05 is a flush-mounted, 40×40 mm square inductive proximity sensor designed to detect metal targets with a real switching distance of 20 mm in industrial environments. The rugged 40×40×118 mm plastic housing, featuring a PA 6.6 active sensing surface, supports flush mounting for tight spaces and carries IP67 protection. It provides a NO/NC switching output and operates from a wide supply range of 20–275 V DC or 20–253 V AC, with threaded screw terminals for robust connection. The unit tolerates a temperature range of -25 to 85 °C and uses a 2.5 mm² conductor cross-section for wiring. The datasheet specifies a real switching distance sr of 20 mm, hysteresis up to 10% of Sr, and defines the device as part of Balluff’s BES Q40KU-UPU20B-KN05 family (order code BES05YY). CE and UKCA conformity mark the sensor for global industrial use, making it a compact, reliable choice for position sensing and automation tasks that require metal detection in constrained spaces.