What you get when the RFQ line says XUYFNEP100120
It carries UPC 389119006395, which is the only logistics-grade identifier on the spec sheet, so that is the number to put on the receiving paperwork if the barcode must be scanned in. The product description from the manufacturer reads simply: Telemecanique XUYFNEP100120 Photoelectric Fork Sensor — a fork-style through-beam device where the emitter and receiver sit in a fixed U-shaped housing, so alignment is mechanical, not optical.
Where this fork sensor sits in the panel
A fork sensor in this family is the cleanest fit for label detection, parts-present checks on a small conveyor, or notch detection on a passing edge — the fork gives you a fixed optical axis, so you skip the alignment dance of a separate emitter and receiver pair. Because the beam path is fixed inside the housing, the usual failure mode you'd chase elsewhere — drift after a bracket nudge, beam clip on a misaligned reflector — is removed by construction; what you're left to chase is lens contamination, which is the first thing to check on a routine trip. It's noise till proven otherwise: if the sensor sits near a VFD output cable or a contactor coil that isn't suppressed, the switching threshold can get jittery, so verify the signal at the PLC input before you swap the part.