Magnetoeleastic torque sensor

A non-contact type torque sensor for magnetically detecting torque transmitted to a rotatable shaft. The torque sensor comprises a magnetic alloy portion carried on or as a component of the shaft and another portion not in contact with the shaft comprising one or more sensing elements positioned about the shaft so that anomalies e.g non-axisymmetric inhomogeneities in the magnetic alloy do no affect the reading. Disclosed are various arrangements of sensing elements to achieve this result the first is a plurality of coil pairs each coil pair including a coil wound in a first direction and a coil would in a second direction the two coils being disposed in end to end alignment with each other.