Ultrasonic flowmeter: The propagation time 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 accuracy. However, the fouling of the pipeline can affect the accuracy. Ultrasonic flow meters have become more widely used in the industry because of their ability to effectively measure natural gas flow. This measurement is non-intrusive and does not cause pressure loss. Ultrasonic flow meters require relatively clean fluids.
Vortex flowmeter: A non-streamlined vortex generator is placed in the fluid. The velocity of the vortex is proportional to the velocity of the fluid, and the volume flow is calculated. 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.
Turbine Flow Meter: The fluid rotates the rotor as it flows through the turbine flow meter. The speed of rotation of the rotor is related to the speed of the fluid. The average flow rate sensed by the rotor is used to derive the flow rate or total amount. Turbine flowmeters can accurately measure clean liquids and gases. Like PD flowmeters, turbine flowmeters also produce irrecoverable pressure errors and require moving parts.
Electromagnetic flowmeter: When a conductive fluid flows through an electromagnetic field, the velocity of the fluid can be obtained by measuring the voltage. It has no moving parts and is not affected by fluids. Measurement of conductive liquids at full pipe is highly accurate.