The Square D XS518BLPBM12 is an 18 mm inductive proximity sensor from the OsiSense XS series, specified for flush mounting with a 5 mm sensing range. It switches at 2000 Hz and carries a PNP normally-closed output, rated for 200 mA over 12–48 VDC. The body is nickel-plated brass with a polyphenylene sulfide sensing face, protected to IP67/69K. Common in machine position detection, conveyor routing, and part presence on high-speed lines where washdown resistance matters.
The XS4P30PC410D (30 mm barrel, unshielded, 15 mm sensing, NO/NC PNP, 12–24 VDC) is a different frame and sensing profile. The XS518BLPBM12 is a direct swap only when the existing drawing calls for the 18 mm flush-mounted variant with PNP NC wiring and 5 mm range.
UL, CSA, and CE approved; RoHS compliant. The 4-pin M12 male connector (3-wire) is standard for PNP DC sensors; verify the mating cable pinout before the install shift.