Caliper tool and sensor for use in high pressure environments

A sensor, comprising:

• a sensor body comprising a non-magnetic material and having an interface end proximal to a magnetically-permeable target;
• a primary coil disposed within the sensor body, the primary coil configured to provide a primary output signal in response to receiving an alternating current excitation from a controller;
• a secondary coil disposed within the sensor body away from the interface end of the sensor body and adjacent to the primary coil;
• a magnetically-permeable extension at least partially disposed within the sensor body and extending through the secondary coil to the interface end of the sensor body for inductively coupling the secondary coil to the target, the secondary coil configured to provide a secondary output signal based on the rotational position of the target relative to the sensor body;
• another secondary coil disposed within the sensor body away from the interface end of the sensor body, adjacent to the primary coil and angularly spaced apart from the secondary coil;
• another magnetically-permeable extension at least partially disposed within the sensor body and extending through the another secondary coil to the interface end of the sensor body for inductively coupling the another secondary coil to the target, the another secondary coil configured to provide a secondary output signal based on the rotational position of the target relative to the sensor body.