The Festo SMT-8-PS-K-LED-24-B is a magneto-resistive proximity sensor designed for T-slot pneumatic cylinders. It switches PNP normally open, so it pulls the output high when the piston magnet passes — standard for most PLC inputs that expect a sourcing signal. Operating voltage is 10-30 V DC, which covers the 24 V nominal supply common in industrial panels.
The sensor body fits the standard T-slot groove found on Festo and many other cylinder families. Cable connection keeps the wiring simple — no separate connector to source. The operating temperature range of -5 to 60 °C suits most indoor production environments; if your line sees washdown or outdoor exposure, check that the IP rating (not listed here) matches your zone.