Omron E2AW-M18LS05-M1-B1 is a current-lifecycle M18 threaded-barrel inductive proximity switch. The 0.197 in (5 mm) sensing distance defines its range for ferrous-target detection in typical M18 mounting holes.
M18 barrel diameter fits standard 18 mm drilled holes or mounting clamps. The 5 mm sensing distance suits flush or non-flush mounting depending on the target material; verify derating for non-ferrous metals per Omron E2AW series notes.