Mass flow meters, also known as Coriolis mass flow meters, have been widely used in the petrochemical industry in recent years for flow measurement, especially for the measurement of finished oil. It belongs to the direct mass flow meter, with a measurement accuracy generally between 0.1% and 0.2%. The flow meter is available in the YS-MFU series DN3-200, with a flow range of 0 to 120t, meeting the requirements for product oil trade settlement and stable performance. This type of flow meter integrates flow measurement, temperature measurement, and density measurement, without movable components, making it easy to measure the density, temperature, and flow rate of finished oil. Its advantage is that there is no need for temperature and pressure correction, and volume measurement must correct the measured volume to standard conditions; The petroleum industry usually uses "ton (t)" as the basic unit of petroleum measurement, while finished oil usually uses "liter (L)" as the basic unit. Coriolis mass flow meters can easily convert measurement units, saving time, effort, and cost. Therefore, the Coriolis mass flowmeter has been widely used in the field of refined oil products in China.