The Foxboro CFS10 and CFS20 mass flow tubes form a Coriolis mass flow measurement together with the CFT51 series Coriolis transmitter. The principle of Coriolis acceleration is used, with which real mass flow measurements of liquids can be carried out directly, without the need for a separate temperature, pressure or density meter. The CFS10 has a single flow tube and is available in diameters from 3 to 50 mm. The CFS20 has double flow tubes and is available in diameters from 40 to 80 mm.