Position sensor, designed in particular for detecting a steering column torsion

A torsion sensor comprising:

• two rotating parts connected by an elastic test member;
• a position sensor comprising two parts integral respectively with the two rotating parts,
• the position sensor being composed of a first magnetic structure containing a plurality of radially magnetized magnets and a second magnetic structure containing two ferromagnetic rings provided with a plurality of teeth and defining an air gap, at least one magnetosensitive element placed in the air gap, the first and second magnetic structures being integral respectively with two parts in relative rotation, wherein the two ferromagnetic rings are intermeshed and each is provided with a substantially tubular part forming axially oriented teeth, connected by a transverse flux-closure zone, the air gap being bounded by the flux-closure zones.