Mechanical volumetric flow-meter with nutating disc, able to provide a high degree of precision for the measurement of diesel flow for non-commercial use. Equipped with a totaliser and a partial meter, the device is able to be reset via the side knob, allowing the user to change the output direction of the fual as needed. The meters are also fitted with regulation screws for precision adjustment. The flow-meter can be applied to motor pumps or fed via gravity.