Pepperl + Fuchs NBN8-12GM50-E0-V1 NPN inductive proximity switch installs easily on all of our Standard, PRO, and Benchtop machine kits, or machines from other manufacturers. These same sensors are included in our Proximity Limit Switch Kits. These sensors can be used as homing switches or for active safety limits to prevent crashes and protect your machine. We highly recommend these sensors with any of our Standard CNC, PRO CNC[1], or Benchtop CNC machine kits.