The NBB4-12GM50-A2 Inductive Sensor manufactured by Pepperl & Fuchs is an AC/DC-operated cylindrical inductive proximity sensor, designed to detect metallic objects of any shape and size. It features a robust stainless-steel housing, and is available with an integrated amplifier and PNP (NPN optional) output with selectable NO/NC, adjustable between 0 and 4 mm, and with 10–30 VDC power supply. It is designed to operate in extreme temperatures, and has a short circuit protection and reverse-polarity protection. It is suitable for various applications such as material handling, packaging, textile production, etc.