This is an inductive proximity sensor with a flush-mounted M12 barrel design, providing PNP normally open switching output. The M12 4-pin connector allows straightforward cable connection within a control panel or machine wiring system. Flush mounting permits installation level with surrounding metalwork, suiting applications where the sensor face must sit within a metal housing or frame without protrusion. It is typically used for non-contact detection of metal targets in automation and machine-building applications.