U Series Coriolis Flow Meter

U Series Coriolis Flow Meters

U series Coriolis flow meter – for mass, volume, temperature and density measurement.

Coriolis flow meter is a flow meter that measures fluid mass based on the Coriolis force principle. It is mainly composed of a flow sensor and a flow transmitter. Sino-Inst U series Coriolis mass flow meter is an advanced high-precision mass flow measurement instrument.

Coriolis Mass Flow Measurement

Coriolis flow meter can directly measure the mass flow rate of fluids. It has low requirements for fluid state and can show excellent performance even in harsh working environments.

Mass flow measurement is the basis of many key elements in all industries. Including most formulations, material balance determinations, and billing and custody transfer operations. Since these are the most critical flow measurements in processing plants, the reliability and accuracy of mass flow detection are very important.

Coriolis Mass Flow Measurement is widely used in a variety of different industrial sectors. For example, life sciences, chemicals, petrochemicals, oil and gas, food, and equally important custody transfer applications.

Coriolis flow meter can measure almost all fluids: detergents, solvents, fuels, crude oil, vegetable oils, animal fats, latex, silicone oil, alcohol, juice, toothpaste, vinegar, ketchup, mayonnaise, gas or liquefied gas. In addition to normal fluids, it can also measure industrial media that are difficult to measure with general fluid measuring instruments, such as non-Newtonian fluids, various slurries, suspensions, etc.

Series Coriolis Mass Flow Meters

Features of Coriolis Flow Meter

  1. High-precision measurement ±0.1~0.2%;
  2. Wide range of applications. 316L stainless steel structure is suitable for a variety of media. The instrument coefficient is not affected by liquid measurement. It can accurately measure gas.
  3. Multivariable flow. Provides accurate measurement for a range of variables. Including mass flow, volume flow, total flow, density and temperature.
  4. Adopts MVD multivariable digital technology converter. Transition from analog signal processing to digital signal processing. It can generate stable signals. And then improve the response speed and measurement accuracy.
  5. Easy to use. LCD display, users can touch buttons in Chinese/English. Directly and conveniently perform configuration operations.
  6. Reliability and repeatability. The wear-free moving parts enable the instrument to maintain reliability and repeatability for a long time. And ensure high-precision flow and density measurement in conventional process control applications.

U Series Coriolis Flow Meter Technical Specifications

Sensor measurement parameters:

Measuring diameter range:DN6~DN200
Fluid measurement accuracy:±0.1~0.2%
Density measurement range:0.3~3.000g/cm3  , accuracy: ±0.002g/cm3  
Working temperature of measured medium:Standard type: -50~200℃
High temperature type: -50~350℃
Low temperature type: -200~200℃
Measurement accuracy: ±1℃
Measuring tube material:SS316L
Shell material:SS304
Working pressure:0~4.0MPa (high pressure can be customized)
Explosion-proof standard:Exd(ia)IICT6Gb

Converter measurement parameters:

Output:4-20mA, pulse, RS485
Communication: MODBUS, HART
Power supply:220VAC or 24VDC
LCD display content: flow, temperature, density
Explosion-proof standard: Exd(ia)IICT6Gb

Flow Range and Zero point stability

DiameterFlow RangeZero point stability
200  0~900000~1200000

coriolis flow meter applications

Sino-Inst Coriolis Flow Meter can be used for monitoring in the following areas to meet the needs of batching, mixing processes and commercial metering:

  • Chemical industry, such as systems with chemical reactions;
  • Petroleum industry, such as water content analysis;
  • Oil industry, such as vegetable oil, animal oil and other oils;
  • Pharmaceutical industry;
  • Coating industry;
  • Paper industry;
  • Textile printing and dyeing industry;
  • Fuel industry, such as oil, heavy oil, coal-water slurry and other fuels, lubricating oil;
  • Food industry, such as dissolved gas beverages, health drinks and other fluids;
  • Transportation industry, such as the measurement of pipeline transported liquids;

Coriolis effect refers to a phenomenon in which an object moving in a rotating coordinate system is deflected. When this effect occurs, the acceleration relative to the body will be perpendicular to the relative velocity currently carried. Thus, the Coriolis effect will be stronger or weaker depending on the speed at which the object is moving.

The Coriolis effect is an effect caused by the Coriolis force, which is a deflection component of the centrifugal force generated by the rotation of the earth. It deflects the fluid in the northern hemisphere to the right and the fluid in the southern hemisphere to the left. This phenomenon was first discovered by Coriolis (G.C.de Coriolis 1835), so it is called the Coriolis effect or Coriolis acceleration.

Its magnitude is proportional to the sine of the latitude angle, decreasing from the equator to the poles. The Coriolis effect has a great influence on the atmospheric and ocean circulation. Under its influence, a huge clockwise ocean circulation is formed in the northern hemisphere. In the southern hemisphere, a counterclockwise ocean circulation is formed.

The mass flow sensor consists of a measuring tube, a measuring tube drive device, a position detector, a supporting structure, a temperature sensor, a housing, and other parts.

When a particle in a tube that rotates around a fixed point P (rotation center) moves toward or away from the rotation center, an inertial force will be generated. The principle is shown in the figure:

Coriolis Liquid Mass Flow Meter working principle

In the figure, a particle with a mass of δm moves to the right in the pipe at a uniform speed υ. The pipe rotates around a fixed point P at an angular velocity ω.

At this time, the particle will obtain two acceleration components:

  1. Normal acceleration αr (centripetal acceleration), whose magnitude is equal to ω2r and its direction is toward point P.
  2. Tangential acceleration αt (Coriolis acceleration), whose magnitude is equal to 2ωυ and its direction is perpendicular to αr.

The force generated by the tangential acceleration is called the Coriolis force. Its magnitude is equal to Fc=2ωυδm. In the figure, the fluid δm=ρA×ΔX. Therefore, the Coriolis force can be expressed as:


Where A is the cross-sectional area of ​​the pipe.


For a specific rotating pipe, its frequency characteristics are certain, and ΔFc depends only on δqm. Therefore, the mass flow rate can be measured by directly or indirectly measuring the Coriolis force. The Coriolis principle mass flowmeter works according to the above principle.

The actual flow sensor does not realize rotational motion, but instead uses pipe vibration. The principle diagram is shown in Figure .

The two ends of a curved pipe are fixed. A vibration force (according to the resonant frequency of the pipe) is applied to the pipe at the middle position of the two fixed points. It is made to vibrate with its natural frequency ω around the fixed point as the axis.

When there is no fluid flowing in the pipe, the pipe is only affected by the external vibration force. The two halves of the pipe vibrate in the same direction and there is no phase difference.

When there is fluid flowing, it is affected by the Coriolis force Fc of the medium particles flowing in the pipe (the Coriolis forces F1 and F2 in the two halves of the pipe are equal in magnitude and opposite in direction (Figure 1.2). The two halves of the pipe twist in opposite directions, resulting in a phase difference (Figure 1.3, Figure 1.4). This phase difference is proportional to the mass flow rate.

The design of the sensor is to convert the measurement of the Coriolis force into the measurement of the phase time difference on both sides of the vibrating tube. This is the working principle of the Coriolis mass flowmeter.

Vibration principle of mass flowmeter

Mass flowmeter is an instrument used to accurately measure the mass flow rate of fluid (liquid or gas). With the development of technology, many types of mass flowmeters have appeared on the market. Thermal mass flowmeter and Coriolis mass flowmeter are two types with relatively high accuracy and are more commonly used. So what is the difference between them?

  1. Different measurement principles

Thermal mass flowmeter uses the heat capacity of the fluid to measure the mass flow rate. The core of the device is a heater and one or two temperature sensors. The power applied by heating (using one sensor) or the temperature difference between the two sensors is proportional to the mass flow rate of the fluid. Thermal mass flowmeter is mainly used for gas.

Coriolis mass flowmeter uses the Coriolis effect to directly measure the mass flow rate of the fluid.

  1. Different measurement accuracy

The measurement accuracy of Coriolis mass flowmeter is very high, which can reach 0.1% or higher. The accuracy of thermal mass flowmeter is usually ±1.5%.

  1. Different applicable fluids

Thermal mass flowmeter is suitable for gas. But it cannot measure liquids.

Coriolis mass flowmeter is suitable for complex fluids such as high viscosity, high viscosity and mud solution. It can also be used to measure gas.

  1. Different environmental conditions

Although both flowmeters can work in high temperature and high pressure environments, the Coriolis mass flowmeter is not sensitive to changes in environmental conditions and fluid properties. The stability and reliability of the thermal mass flowmeter may be affected under high temperature and high pressure conditions.

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Coriolis Flow Meter is favored for its high accuracy and reliability, and has become an important tool for modern industrial flow measurement. Based on the Coriolis principle, the mass flow meter can accurately measure the mass flow of the fluid without being affected by changes in the physical properties of the medium.

Sino-Inst produces and supplies a full range of mass flow meters. Including U-type, triangle, straight tube structure, etc. High temperature, low temperature, high pressure, and other parameters can be customized.

With our many years of experience in mass flow measurement, we provide you with a more reasonable mass flow measurement solution!

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    U Series Coriolis Flow Meter-Stable Performance-Better Price

    U series Coriolis flow meter - for mass, volume, temperature and density measurement.

    Product SKU: U Series Coriolis Flow Meter

    Product Brand: Sino-Inst

    Product Currency: USD

    Product Price: 3699

    Price Valid Until: 2029-09-09

    Product In-Stock: PreOrder

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