Ratings that decide the fit
Maximum sensing distance is 15 m with a reflector, paired to a 20 Hz switching frequency and a 25 msec response time — the right pace for conveyor, gate, or pallet-detection duty, not for high-speed counting. Operating envelope is -13 °F to 131 °F, which covers standard indoor industrial cabinets and most outdoor enclosures but rules out freezer or oven service without derating review. The relay output carries a 3 mA minimum load current — anything lighter (a high-impedance PLC input or a low-power indicator) wants a buffer relay, since the dry contact will not switch reliably below that floor. Sealing is IP65 and IP67 on a plastic body, with CE, CSA, and UL Listed marks on the rating plate. The package is the standard 31 mm wide by 92 mm tall XUX compact block, with indicator lights on the body for power and output state.
How it compares to a true sibling
Inside the XUX family, the closest functional second-source is the XUX0ARCTT16 multimode programmable unit — same 24-240V AC & DC supply, same 1 C/O relay output, same 20 Hz / 25 msec timing, but with selectable background-suppression, diffuse, polarized retro, and retro modes on the same body. The trade-off is fixed-versus-programmable: XUX9ARCNT16 ships as a dedicated polarized retroreflective sensor and stays simple on the line, while XUX0ARCTT16 trades the 15 m reach for an 11 m max and adds mode switching on the housing.
Sourcing reality
Let me be transparent on the parallel-import angle: a genuine XUX9ARCNT16 sourced from a different authorized region is the same part, different passport — same IP65/IP67 rating, same 24-240V AC & DC supply, same 1 C/O relay, but warranty service runs through the region of sale rather than the region of installation.