The Coriolis mass flowmeter is a direct mass flow meter made by the Coriolis force principle which is in a rotating system while the fluid moves in a straight line, and is proportional to the mass flow. The measurement accuracy is very high. Coriolis mass flow meters measure a wide range of fluids, including liquids containing trace gases, liquids of high viscosity liquids, slurries containing solids, and medium to high pressure gases of sufficient density. The measuring tube has a small vibration amplitude and can be regarded as a non-moving member, and the measuring tube has no obstruction and moving parts. The measured value is not sensitive to the viscosity of the fluid, and the change in fluid density has little effect on the measured value . Multi-parameter measurements can be made, such as measuring density at the same time, and thereby deriving the concentration of the solute in the measurement solution. It not only has accuracy, repeatability, stability, but also has no flow blocking elements and movable parts in the fluid passage, so it has good reliability, long service life, and can measure the flow rate of high viscosity fluid and high pressure gas. At present, the measurement of clean fuel compressed natural gas (CNG) for automobiles is based on it, and its application in the petroleum, chemical, building materials, paper, food, bioengineering, energy and other industrial fields is becoming more and more widespread. Coriolis mass flow meters eliminate the common problems encountered by many flow meters in complex fluid measurement and control. 1. Regarding the measurement results, regardless of the physical properties of the fluid in the pipeline, the meter coefficient K does not change due to the change of the Reynolds number, so there is a very wide range ratio and good linearity. 2. For incompressible liquids, the measurement of instantaneous flow is independent of the history of flow in the U-tube, so reliable and accurate measurements can be obtained even for unsteady (unsteady) flows. 3. The measurement is independent of the flow velocity distribution in the pipeline. It allows different flow velocity distributions on different sections, even partial reflow. Therefore, it does not require special requirements for the upstream and downstream pipelines, nor does it require flow in the pipeline. Certain criteria must be met. The product is suitable for field transmitters of almost all fluids, guarantees high accuracy and high stability over a wide range, high-precision digital signal processing for accurate and stable measurement, and the sensor's special decoupling system ensures that the instrument is protected from the outside world. The effect of weight or vibration. After years of development, Coriolis mass flow meters have been in various forms. According to the shape of the test tubes, they can be roughly classified into four types, namely: straight tube type, curved tube type, single tube type and multi-tube type ( Generally double tube type). The straight tube type instrument is not easy to accumulate gas, and the flow sensor is small in size and light in weight. However, the natural frequency is high, so that the natural frequency is not too high, the wall is often made thinner and susceptible to wear and corrosion. The instrument tube of the curved tube type detection tube has low rigidity and low self-vibration frequency. A thicker tube wall can be used, and the instrument has good wear resistance and corrosion resistance, but additional errors are caused by the accumulation of gas and residue. The single-tube type meter does not split, the flow in the measuring tube is equal everywhere, it is good for the stable zero point, and it is also easy to clean, but it is susceptible to external vibration interference, only found in early products and some small-diameter instruments. The double-tube type meter can reduce the influence of external vibration interference by measuring the phase difference between the two tubes. Stainless Steel Shot,Stainless Steel Cut Wire Shot,Sus430 Stainless Steel Shot,Stainless Round Steel Shot Longlived Metal Products Co ., Ltd , https://www.longlivedmetalproducts.com
