A measuring system for measuring a mass flow rate, a density, a temperature and/or a flow rate. The measuring system includes a main conduit which leads from a supply unit to a consumer, a measuring unit, a computing unit, and an outlet pressure controller. The measuring unit has a first Coriolis meter arranged in the main conduit, a second Coriolis meter arranged in series with the first Coriolis meter in the main conduit, a bypass conduit via which the second Coriolis meter is bypassable, and a valve which opens depending on a pressure arranged in the bypass conduit. The second Coriolis meter has a smaller maximum flow rate than the first Coriolis meter. The computing unit is connected to each of the first Coriolis meter and the second Coriolis meter. The outlet pressure controller is arranged in the main conduit downstream of the measuring unit.