Magnetic reed sensor for pneumatic actuator position sensing
The Festo SME-1-LED-24-B is a magnetic reed proximity sensor designed to detect piston position in pneumatic cylinders. It operates on 12 to 27 V AC/DC and switches up to 1 A with a normally open output, making it suitable for direct interface with PLC inputs or relay coils. The IP67 rating means the sensor body and cable entry withstand washdown and dust ingress — common on packaging and material-handling lines where coolant or cleaning agents are present.
Switching frequency and cable length — what they mean on the line
Rated at 500 Hz switching frequency, the SME-1-LED-24-B can track fast-cycling cylinders — short-stroke pick-and-place or high-speed indexing — without missed edges. The 2.5 m cable gives enough reach from a cylinder-mounted sensor back to a junction box or I/O block; if your layout needs longer runs, plan for a terminal block extension rather than cutting and splicing the molded cable.
The SME-1-LED-24-B carries a current lifecycle status.