Axial flux focusing small diameter low cost torque sensor

A torque sensor assembly comprising:

• an upper rotor mounted on an upper shaft axially disposed about a rotational axis, the upper rotor comprising a plurality of magnets disposed within a non-magnetic structure of the upper rotor;
• an outer lower rotor axially disposed about the rotational axis;
• an inner lower rotor axially disposed about the rotational axis between the upper rotor and the outer lower rotor;
• and
• at least one probe positioned between the outer lower rotor and the inner lower rotor, the at least one probe measures axial flux generated by the upper rotor and directed by the outer lower rotor and the inner lower rotor.