When a conductive fluid flows through an electromagnetic field, the velocity of the fluid can be obtained by measuring the voltage. Electromagnetic flowmeters have no moving parts and are not affected by fluids. Measuring conductive liquids at full pipe is highly accurate. Electromagnetic flow meters can be used to measure the flow rate of a slurried fluid.
Ultrasonic flowmeter
The time-of-flight method and the Doppler effect method are commonly used ultrasonic flowmeters to measure the average velocity of a fluid. Like other speedometers, it is a meter that measures volume flow. It is an unobstructed flowmeter and does not require insertion if the ultrasonic transmitter is installed outside the pipeline. It is suitable for almost all liquids, including slurries, with high precision. However, the fouling of the pipeline can affect the accuracy.
Vortex flowmeter
Vortex flowmeters place a non-streamlined vortex generator in the fluid. The velocity of the vortex is proportional to the velocity of the fluid to calculate the volume flow. Vortex flowmeters are suitable for measuring liquids, gases or steam. It has no moving parts and no dirt problems. Vortex flowmeters produce noise and require fluids with higher flow rates to generate vortices.
Thermal mass flow meter
The fluid velocity is measured by measuring an increase in the temperature of the fluid or a decrease in the thermal sensor. Thermal mass flow meters have no moving parts or holes and can accurately measure gas flow. Thermal mass flow meters are one of the few techniques that can measure mass flow, and are also a few techniques for measuring large-diameter gas flow.
Coriolis flowmeter
This type of flow meter uses a vibrating fluid tube to produce a deflection that corresponds to the mass flow to measure. Coriolis meters can be used to measure the mass flow of liquids, slurries, gases or steam. High accuracy. However, regular maintenance of the pipe wall is required to prevent corrosion.
Electromagnetic Flowmeter
Measuring principle: Faraday's law of electromagnetic induction proves that a conductor moving in a magnetic field will induce a potential. Using electromagnetic measurement principle, fluid is the conductor in motion. The induced potential is proportional to the flow rate and detected by the two measuring electrodes. The transmitter then amplifies it and calculates the flow based on the cross-sectional area of ​​the pipeline.