The SICK UC4-11341 is an ultrasonic proximity sensor from the UC4 Series, with a sensing range from 13 mm minimum to 100 mm maximum. It switches at 30 Hz and outputs a PNP signal, so it's a straightforward presence or level detector for non-contact object detection in automated lines. The housing is ABS plastic, sealed to IP65 and IP67, meaning it handles washdown and outdoor moisture without issue. Termination is via an M8 3-pin connector — a compact footprint that saves space on the machine frame.
No need to hunt for surplus or worry about a looming cut-off.