The SMT-8M-A-PS-24V-E-0; 3-M8D Sensor: The is marked as current. That means Festo is still manufacturing this sensor, and you can source it without worrying about an imminent phase-out. For a small shop like mine, that's one less headache — no scrambling for a replacement mid-production run.
The description on file reads: Festo SMT-8M-A-PS-24V-E-0; 3-M8D Sensor Festo SMT-8M-A-PS-24V-E-0; 3-M8D Sensor. That's the full product identifier as it appears in the system.