Exploring the World of Flowmeters – Hefei Jingda Instrument Knowledge Classroom

Revealing the characteristics and application scenarios of common liquid flow meters

1. Keshi mass flowmeter – an innovator in precise measurement
   On the path of pursuing ultimate measurement accuracy, Keshi mass flow meters stand out with their high precision and reliability.
   Working principle: The mass flow rate of the fluid is indirectly obtained through the Coriolis force generated by the fluid inside the fluid tube.
   Advantages: High precision, high reliability, able to measure various parameters such as mass flow rate, density, temperature, etc.
   Disadvantages: Sensitive to external vibration interference, cannot be used for larger pipe diameters, and cannot measure low-density and low-pressure gases.

2. Volumetric flowmeter – traditional and precise choice
   Positive displacement flow meters have become the preferred choice for precise measurement applications due to their high precision and stable performance.
   Working principle: The measuring element divides the fluid into multiple unit volumes, and indirectly measures the flow velocity of the fluid by measuring the number of rotations of the moving element.
   Advantages: High precision, minimal environmental impact, no requirement for straight pipe sections, large range ratio, usually used for expensive medium measurement or when precise measurement is needed.
   Disadvantages: Complex structure, bulky volume, high noise, and difficult maintenance.

3. Electromagnetic flowmeter – a revolutionary choice without pressure loss
   Electromagnetic flow meters provide an ideal solution for measuring dirty fluids such as solid particles and suspended solids.
   Working principle: Based on Faraday’s law of electromagnetic induction, the flow rate of the measured fluid is indirectly obtained by measuring the electromotive force of the conductive fluid in the magnetic field.
   Advantages: No pressure loss, can be used for dirty fluids containing solid particles, suspended solids, etc., with a large measurement range, linear output, easy maintenance, measurement results independent of physical parameters such as medium temperature and viscosity, and the range can be modified on site according to user requirements.
   Disadvantages: Not suitable for low conductivity fluids and cannot be used for fluids at higher temperatures.

4. Turbine flowmeter – a powerful tool for high-pressure measurement
   Turbine flowmeters occupy a place in the field of high-pressure measurement due to their high precision, good repeatability, and wide range..
   Working principle: Under the action of fluid, the impeller rotates periodically under force, changing the magnetic flux of the magneto electric converter. Through magneto electric conversion, a pulse signal is output, and the number and frequency of the pulse signal are proportional to the flow rate through the sensor.
   Advantages: High precision, good repeatability, wide range, simple structure, suitable for high-voltage measurement.
   Disadvantages: The viscosity should be below 5mPa. s, which requires high requirements for the straight pipe section of the sensor and high cleanliness of the medium.

5. Vortex flowmeter – a multifunctional and easy to maintain option
   The vortex flowmeter provides an efficient and economical solution for fluid measurement due to its simple structure and wide measurement range.
   Working principle: A vortex generator triangular column is set up in the fluid to generate regular vortices on both sides of the triangular column. The fluid vortex generates alternating pressure on the triangular column, which is the frequency of vortex generation. The piezoelectric signal sensor detects the electrical signal, which is amplified by a preamplifier and converted into a standard electrical signal output. The frequency of vortex generation is proportional to the velocity of the fluid.
   Advantages: Simple structure, easy installation and maintenance, capable of measuring a wide range of fluid types; High accuracy, low pressure loss, and wide measurement range.
   Disadvantages: Measuring liquids requires low viscosity, and the measurement flow rate range is limited to 0.3-10m/s for liquids and 3-65m/s for gases; There must be sufficient straight pipe sections upstream and downstream.

Each type of flowmeter has its unique advantages and applicable scenarios. It is crucial to understand the working principle, advantages and disadvantages, and scope of application when choosing a traffic timer. Hefei Jingda Instrument is committed to providing high-quality flow meter solutions to meet your needs in different application scenarios. Welcome to consult, let’s explore more possibilities together!