Comparison of basic knowledge of common flowmeter
Volumetric Flowmeter (PD)
The PD flowmeter is used to measure the volume velocity of a liquid or gas, which introduces the fluid into the metering space and calculates the rotational times. The impeller, gear, piston or orifice plate are used to shunt the fluid. PD Flowmeter is one of several methods to measure viscous liquids with high accuracy. But it also produces unrecoverable pressure errors and the need for moving parts.
Turbine flowmeterWhen the fluid flows through the turbine flowmeter, the fluid rotates the rotor. The rotational speed of the rotor is related to the velocity of the fluid. The flow rate or total amount is deduced through the average flow velocity of the fluid which is felt by the rotor. The turbine flowmeter can accurately measure clean liquids and gases. Like PD flowmeter, the turbine flowmeter also produces unrecoverable pressure errors, and also requires moving parts.
Electromagnetic flowmeterWhen a conductive fluid flows through an electromagnetic field, the velocity of the fluid can be obtained by measuring the voltage. The electromagnetic flowmeter has no moving parts and is unaffected by the fluid. The measurement of conductive liquids is very high in full tube. The electromagnetic flowmeter can be used to measure the flow velocity of slurry fluids.
The PD flowmeter is used to measure the volume velocity of a liquid or gas, which introduces the fluid into the metering space and calculates the rotational times. The impeller, gear, piston or orifice plate are used to shunt the fluid. PD Flowmeter is one of several methods to measure viscous liquids with high accuracy. But it also produces unrecoverable pressure errors and the need for moving parts.
Turbine flowmeterWhen the fluid flows through the turbine flowmeter, the fluid rotates the rotor. The rotational speed of the rotor is related to the velocity of the fluid. The flow rate or total amount is deduced through the average flow velocity of the fluid which is felt by the rotor. The turbine flowmeter can accurately measure clean liquids and gases. Like PD flowmeter, the turbine flowmeter also produces unrecoverable pressure errors, and also requires moving parts.
Electromagnetic flowmeterWhen a conductive fluid flows through an electromagnetic field, the velocity of the fluid can be obtained by measuring the voltage. The electromagnetic flowmeter has no moving parts and is unaffected by the fluid. The measurement of conductive liquids is very high in full tube. The electromagnetic flowmeter can be used to measure the flow velocity of slurry fluids.
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