Abstract: A device for adjusting an inertia cone crusher discharge gap comprises an angle sensor responsive to deflection of the breaking head axis from the vertical and generating a signal used to control an actuator providing vertical displacement of a crushing bowl of the crusher with respect to the breaking head thereof to change the size of the discharge gap. The sensor is an induction-type sensor including inductance coils connected electrically in parallel, and mounted fixedly around the breaking head and uniformly distributed along a circle having the center on the vertical axis of the crusher, and at least one permanent magnet coupled mechanically with an out-of-balance weight inducing electrical signals in said inductance coils as the out-of-balance weight is rotating.