PAS sensor hype?

G'day,
With regard to the basic three wire PAS sensors, it would make sense that these are a pair of hall detectors with a quadrature decoder built in to provide one pulse per magnet upon forward rotation only. However most seem to be described as "dual-magnetic loop - Hall elastic angle difference to detect the dynamic torque". This sounds like marketing hype to me, or is there some magic going on to actually detect rotational torque rather than just rotational speed?

A factual technical discussion would be most welcome.
Thanks,
DG

Do you have a link to a specific model? Many are simple rotation sensors, but your description sounds like a torque sensing setup.

the phrase you're seeing is probably just a bad translation from the original chinese. tech stuff doesn't seem to translate well.

a search on the quoted phrase finds a number with that phrase,
https://www.google.com/search?q=%22dual-magnetic+loop+-+Hall+elastic+angle+difference+to+detect+the+dynamic+torque%22

but the ones i randomly looked at like this one
https://www.amazon.com/VGEBY1-Electric-Bicycle-Assistant-Magnets/dp/B07THWPXSS
are all just cadence sensors

G'day,
Yes, the Amazon link provided by Amberwolf is precisely what I am referring to.
So, I guess you have answered the question - all marketing hype!

Cheers & thanks,
DG

Photo of the PAS sensor I took apart
They are claiming dynamic torque.

The ring is not magnetic