[Alan Anderson]

Pneumatic cylinders with magnets are controlled just like pneumatic cylinders without magnets. Use either a Spike relay or the Solenoid Breakout to activate the solenoid valves.

The embedded magnets are detected by Hall effect sensors strapped to the outside of the cylinder. Power the sensor with whatever it requires (I expect that will be 12 volts), and wire its output to the SIG pin of a Digital Input. That will let you read the state of the sensor, which should reflect whether the cylinder's magnet is next to the sensor.

Does that help?