XS1M18MB250K Inductive Sensor, 5mm, 24-240VAC/DC

The XS1M18MB250K is a shielded 18mm inductive proximity sensor from the Telemecanique OsiSense XS series, also branded Square D. It senses ferrous targets at 5mm flush-mounted, meaning it can be embedded in metal without derating the sensing range. Output is 2-wire NC; the wide operating voltage (24–240 VAC / 24–210 VDC) lets it replace sensors in both AC and DC control circuits without changing the supply side. Switching frequency splits by supply type: 25 Hz on AC, 2 kHz on DC—enough for simple position feedback on conveyors or valve positioners but not for high-speed counting lines. Environmental protection is IP68 and NEMA 3/4X/6P/12/13—suitable for washdown, dust, and temporary immersion. Body is nickel-plated brass; sensing face is PPS. Approvals include UL, CSA, and CE, so it ports cleanly into North American and European machine builds. Connection is a 3-pin 1/2-20 UNF male micro connector, common on DC sensors but check your existing cable for mate compatibility.