Coriolis force, electromagnetic, ultrasonic, vortex flowmeter, what are the advantages? What's the best in that case?
The basic measuring principle of Coriolis and thermal mass flowmeter is directly related to the quality and medium, thus excluding conditions (temperature, pressure, composition) the impact of changes and direct mass flow. The Coriolis force can only measure the liquid (there is information that can be measured, and the thermal type powder) using only in gas medium. They don't behave well at high temperatures. Preferred Trade MeasurementElectromagnetic only measuring liquid conductive medium, temperature and pressure resistance performance is not high, medium must be full pipe. Range, bit size, and anti clutter are advantages. First choice for sewage measurement.Ultrasound can not measure the purity of medium, high temperature resistance. Do not use gas to measure gas, and some models can be advantageous without intervention. Tap water metering commonly used.Vortex street is widely used, medium viscosity is too high or impurities are not applicable. The system is often used as a temperature compensated system.In addition to the mass flowmeter (Coriolis force, heat type), other flowmeter will be affected by changes in working conditions.
I've played a lot earlier. I'll add some points:All flowmeters have advantages, but none of them is suitable for all occasions.1 Coriolis mass flowmeter, which can measure gas and liquid. The taxi is natural gas metering is used for Coriolis mass flowmeter;2 、 electromagnetic flowmeter, mainly used for fresh water and conductive medium metering, limited use occasions;3 、 ultrasonic flowmeter is a popular product in recent years. It has been widely used in liquid and gas measurement. Such as the west east gas transmission and large caliber fresh water measurement, if used for trade handover, use multi-channel, the accuracy of up to 0.2; also has a high temperature ultrasonic flowmeter, you can measure the steam.4 、 vortex street is widely used and has high requirement. It is generally used in process control;5 、 thermal mass flowmeter can only be used for gas measurement, accuracy is generally.
