10 mm unshielded, AC 2-wire NC
It's an AC 2-wire device with a normally closed output, so it breaks the load circuit when the target enters the sensing field — typically wired into a safety or interlock loop where a loss-of-target condition needs to open the circuit.
Connector and wiring
Termination is via a 1/2-20 UNF Microchange connector — a threaded industrial circular interface common on North American machine-tool sensors, mates with standard micro-change cordsets.
Listed as current production — quoted to order against the BOM quantity through independent distribution channels.