A sensing device including a sensor, a triggering mechanism and a covering is provided. The covering is positioned in contact with a body such that the triggering mechanism extends from a moving segment to a reference segment and across a joint center located therebetween. Movement of the moving segment activates the triggering mechanism to provide a force input to the sensor, actuating the sensor to generate an output defining at least one measurement of the movement. The measurement may be one or more of rotation, translation, velocity, acceleration, and joint angle. An intermediate mechanism may be interposed between the triggering mechanism and the sensor. The sensing device may include a means to process or record measurements corresponding to movement of the moving segment and joint center. A system and method of measuring the movement of a moving segment is also provided.
