The BALLUFF BES 516-211-E4-E-PU-05 is a discontinued inductive proximity sensor with dimensions of 18 x 61.5 mm, featuring cable connection and normally open (NO) configuration. It has a rated operating distance of 5 mm, operates at 20-250 VAC/DC, and is designed for flush mounting. The sensor maintains reliable performance within a temperature range of -25 to +70°C and carries an IP67 protection rating.