What it is and where it sits
The Square D / Telemecanique XUB9BNBNM12 is an 18 mm tubular photoelectric sensor from the XUB series, using a polarized retroreflective optical stage that pairs with a corner-cube reflector to detect the presence of an object breaking the light beam. It is the front-sensing, threaded-barrel form factor typical of the XUB tubular line, with a 4-pin micro connector on the back and three wires doing the power-and-signal job: supply, ground, and a single NPN output. Photoelectric sensors of this class are used on conveyor and packaging lines, in bottling and material-handling cells, and at machine guarding or part-present detection points where a discrete DC output feeds a PLC or a relay coil.
Ratings that decide the fit
Sensing distance is listed at 2 m with the retroreflector, response time is 1 ms on and off, and the operating frequency is 500 Hz, which together fix the upper limit on how fast a target can pass the beam before the output starts to miss edges on a moving line. Supply is 12 to 24 VDC, output is NC NPN sinking, and the load current rating is 100 mA — the output is sized to switch a PLC DC input or a small interposing relay coil, not to drive a solenoid valve or a contactor directly. The barrel is nickel-plated brass at 18 mm diameter with a threaded body, and the enclosure is rated NEMA 4X/12 and IP67, which keeps washdown and oil-mist environments inside the sensor's envelope.
Compliance and listing identifiers
The listing carries UL, CSA, and CE approvals, and a yellow LED on the body indicates output state for bench setup and fault finding. The record shows UPC 78590146622 (12-digit 389110159083) and identifies the brand as Square D with a Telemecanique-style XUB-series designation, which is the naming the original equipment was sold under in North American distribution. The California Proposition 65 warning is reproduced on the listing for Diisononyl phthalate (DINP) and Di-isodecyl phthalate (DIDP); this is a state-level chemical exposure disclosure, not a CE / UL safety finding.
Sourcing posture
The connectorized 4-pin micro pigtail and 3-wire NPN NC interface match the standard pinout used across the XUB tubular family, so the sensor drops into an existing bracket and cable set on most retrofits without mechanical rework.