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1. What is the difference between a vortex flowmeter and an electromagnetic flowmeter?
The difference between a vortex flowmeter and an electromagnetic flowmeter is as follows:
1. Measurement principle. Vortex flowmeter: It uses the phenomenon of vortex generated by the flow of the vortex vane with the fluid, and calculates the flow rate of the fluid by measuring the rotation frequency or speed of the vortex vane.
. Electromagnetic flowmeter: Using the principle of electromagnetic induction, it measures the electromotive force experienced by a conductive fluid flowing in a magnetic field, thereby measuring the flow rate of the fluid. From the perspective of the original pronunciation, the difference between the two is obvious.2. Structural form: Vortex flowmeter: composed of vortex generator, piezoelectric element, guide element and magnetic circuit part.
. The transmitter housing is made of steel plate or aluminum alloy plate by integral die-casting, and the body and sensor are combined into an integrated unit instrument. Electromagnetic flowmeter: composed of a conductive tube, excitation coil, housing, and electrodes, with secondary meters installed at the upper and lower ends of the electrodes.III. Vortex flowmeter: it is mainly used to measure the flow of liquid, steam and gas, but it is not applicable to viscous liquid, granular solid medium and liquid containing foam and bubbles. Electromagnetic flowmeter: suitable for measuring the flow rate of various conductive liquids, but cannot measure non-conductive media.
Fourth, output signal vortex flowmeter: usually outputs a standard current signal of 4-20mA.
. Electromagnetic flowmeter: outputting a linear signal propor
2. Differences between Electromagnetic Flowmeters, Vortex Flowmeters, Ultrasonic Flowmeters, Turbine Flowmeters, etc.
Electromagnetic flow meters can measure conductive liquids with no pressure loss and a wide measurement range. However, they can only measure conductive media such as rock and water, and are not suitable for non-conductive media such as gas and water treatment heating water.
. Its installation and debugging are cumbersome, demanding, and expensive. Ultrasonic flowmeter is a non-contact measuring instrument suitable for measuring difficult to contact fluid flow and large pipe diameter flow. It does not change the fluid flow state, does not produce pressure loss, and is easy to install. However, its temperature measurement range is not high, it is susceptible to interference, has strict installation requirements, and is relatively expensive. The measuring element of the vortex flowmeter has a simple structure, reliable performance, long service life, wide measurement range, and the volumetric flow rate is not affected by temperature, pressure, density, or viscosity. However, it has poor anti vibration performance and is easily affected by vibration. It has poor adaptability to dirty media, high requirements for straight pipe sections, and poor temperature resistance. Generally, it can o
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