What are the types of liquid flow meters?

Project Overview

　　The following categories and descriptions are as comprehensive and detailed as possible:

• 1、Vortex Flow Meter Principle: Based on the Kamen vortex principle, the volume flow rate is calculated by measuring the vortex frequency. Features: Measures the flow of most gases, liquids and steam with high accuracy and wide range ratio.
• 2、Turbine flowmeter principle: the use of fluid through the turbine when the rotation to measure the fluid flow. Characteristics: high precision, good repeatability. Simple structure, high pressure resistance, easy maintenance. Suitable for volume flow measurement of low-viscosity liquids in closed pipelines. Disadvantage is sensitive to the fluid properties, the need for regular calibration.
• 3、Magnetic inductive flowmeter principle: the application of Faraday electromagnetic induction principle, according to the conductive fluid through the applied magnetic field when the electric potential to measure the flow. Characteristics: suitable for conductive liquids, such as salt water, acid and alkali. Simple structure, no moving parts and flow blocking parts, no pressure loss. Can measure corrosive media, not affected by the temperature, viscosity, density and a certain range of conductivity of the measured medium. But can only measure the flow of conductive liquids.
• 4、Ultrasonic flowmeter principle: the use of ultrasound in different media propagation speed difference to measure the fluid flow. Features: suitable for high temperature, high pressure, corrosive liquids and other harsh environments. Good stability, small zero drift, high measurement accuracy. Can be used for non-contact measurement, no obstruction in the detection parts, no moving parts.
• 5、Principle of volumetric flowmeter: Fluid is introduced into the metering space and the number of revolutions is counted to calculate the flow rate. Characteristics: higher accuracy, is one of several ways to measure viscous liquids. The main varieties are oval gear flowmeter, girdle wheel flowmeter, rotary piston flowmeter, elastic scraper type flowmeter.
• 6、Principle of differential pressure flowmeter: Calculate the fluid flow by measuring the pressure difference before and after the fluid in the pipeline. Characteristics: Accurate measurement, good stability, but need regular pressure calibration. Including orifice plate, venturi, nozzle and homogeneous tube types.
• 7、Rotor flowmeter principle: by measuring the fluid flow in the pipeline to promote the float up and down movement of the position change to reflect the size of the flow. Features: simple structure, low price, but relatively low precision.
• 8、Principle of nullah flowmeter: It is used to measure the flow of liquid in open nullahs, such as rivers and channels. Features: suitable for large flow measurement, usually used in water conservancy, environmental protection and other fields.
• 9、Principle of Coriolis Mass Flow Meter: Measure the mass flow rate by utilizing the Coriolis force generated by the fluid in the rotating pipe. Characteristics: High accuracy, wide range of measuring fluids, including liquids containing traces of gases.

　　These flow meters have their own advantages and disadvantages, the specific selection needs to be based on the measurement medium, measurement range, accuracy requirements, installation environment and other conditions for comprehensive consideration.