The FESTO SMT-10-NS-SL-LED-24 is a proximity sensor in the SMT series, rated for 10-30V DC supply and 200mA output, with an integrated LED status indicator. It sits in the Limit and Proximity Switches category, subcategory Proximity Detection Switches — the kind of sensor you'd find on a pneumatic actuator or cylinder end-of-stroke position feedback on a Festo handling or assembly line.
The 10-30V DC supply range covers standard 24V control panels common in European and North American machine builds. The 200mA output drives a PLC input directly or switches a small relay in the sensor's local control circuit. LED indicator gives a quick visual on target presence during commissioning or fault-finding — saves reaching for a multimeter on a live panel.