A multi-phase flow meter includes a flow conduit leading from an inlet to an outlet and including a variable inlet restriction, a variable outlet restriction, a pressure sensor and a volumetric flow meter, located between the variable inlet restriction and the variable outlet restriction. The flow meter further includes a controller adapted to receive data from the pressure sensor and the volumetric flow meter, and to adjust the variable inlet restriction and the variable outlet restriction in accordance with at least one program. The program causes the controller to adjust one of the variable inlet restriction and the variable outlet restriction.