Hi Hannes and
to the forum.
Unfortunately it is difficult to say whether that PAS sensor will work with the Smart Pie controller, as they don't mention which signal system it uses.
The GM sensors are the Typical PAS type with a single signal wire that sends regular pulses, but only in the forward direction.
Check out the
Signal Types for Basic PAS Sensors section on the eBikes.CA website for further details.
Some sensors produce a variable analogue voltage output based on the pedal rpm, but those may need to be wired directly into the throttle signal wire to allow them to work.
If you install the wrong type, you may find that it will work when pedalling in either direction, or perhaps not work at all.
Alan