The HUALIU Coriolis Mass Flowmeter measures on the Coriolis force principle. The transmitter drives the measuring tubes into reciprocating periodic vibration at a fixed frequency; as fluid flows through the tubes, the Coriolis effect causes the two measuring tubes to undergo torsional vibration. The phase difference between the two signals output by the detection coils at each end of the tubes is proportional to the mass flow of the fluid, from which the fluid mass flow is obtained directly, without conversion through intermediate parameters such as temperature, pressure or density. This eliminates, in principle, the influence of changes in medium state on measurement accuracy.

The flowmeter can measure density and temperature simultaneously: the vibration frequency of the measuring tubes is determined by the total mass of the tubes and the fluid within them, from which the medium density is derived in real time, while a temperature sensor on the measuring tubes monitors the fluid temperature in real time. The transmitter displays measured values such as cumulative mass, density and temperature on an OLED screen, and can output them externally via 4~20mA current, frequency/pulse, RS485 or HART interfaces for reading by host computers and secondary instruments.

The product achieves a mass flow accuracy of up to ±0.1%, a density accuracy of ±0.002g/cm³ and a repeatability of ±0.05%. It offers direct mass flow measurement, a wide turndown, low upstream and downstream straight-run requirements, reliable operation and a low maintenance rate. It can measure non-Newtonian fluids, various slurries and suspensions and other media that are difficult to measure with conventional instruments, and is widely used for mass metering and custody transfer in the chemical, petroleum, oils and fats, pharmaceutical, coatings, paper, textile and dyeing, fuel and food industries.