The BALLUFF BES 516-3021-G-E5-C-S49 is an inductive proximity sensor with dimensions of 6.5 x 45 mm, operating at 10-30 VDC. It features a 2 mm sensing range, normally closed (N/C) contact configuration, and flush mounting capability. Designed for industrial applications, this sensor operates within a temperature range of -40 to +85°C and has an IP67 protection rating.