The Festo SMT-10-PS-SL-LED-24 is a magnetoresistive proximity sensor rated for 10-30 VDC with a PNP normally open switching output. It uses a cable with an M8 plug for connection, and the LED indicator gives local state feedback. The magnetoresistive principle means it detects the magnetic field of a Festo T-slot cylinder piston — no physical contact, so no wear on the sensing element over millions of cycles.
Rated for -20 to 60°C operating temperature, so it works inside a standard control cabinet or on a machine frame without special cooling. The M8 plug connector is common on Festo T-slot sensors — mates directly with the standard Festo M8 cordset, no adapter needed. The PNP output is the typical PLC-input type; verify your input card sinks current if you're replacing an NPN sensor.