Flow meter is one of the important instruments in water, petrochemical and other industries, which can be compared with the eyes of measurement. For water conservancy industry, it has special significance. For example, the addition of pharmaceuticals in the water supply industry, if the accuracy of the relevant meters is not high, will directly affect the quality of water quality, and even affect the safety and health of the user population!

At present, there are many kinds of flow meters, such as: positive displacement flowmeter, turbine flowmeter, vortex flowmeter, differential pressure flowmeter, open channel flowmeter, electromagnetic flowmeter, ultrasonic flowmeter, mass flowmeter and so on. In the water conservancy, water pollution industry, we have a rough statistics, of which the use of portable ultrasonic flowmeters and electromagnetic flowmeters is close to 85%, of which the use of ultrasonic flowmeters, with the development of its electronic technology, there is an upward trend.

Below, talk about the advantages and disadvantages of electromagnetic flowmeter and portable ultrasonic flowmeter for peer reference.

Electromagnetic flowmeter is a flowmeter based on the law of electromagnetic induction (cutting magnetic lines of force) to work:

Its Characteristics:

1.  High measurement accuracy, good repeatability,

2. The price is proportional to the diameter of the pipe

3.  The measured medium is required to have a certain conductivity

Portable Ultrasonic Flowmeter Features:

1.  No moving parts, no pressure loss

2.  No requirements for fluid physical characteristics

3.  Non-contact measurement

4.  The cost has nothing to do with the size of the pipe

5. Easy installation, no need to stop

Many people think that the electromagnetic flowmeter is a non-contact measurement method of work, or that the electromagnetic flowmeter has low requirements for the straight pipe section, which is wrong, and this wrong understanding is often at the cost of accuracy.

In practice, the precision of Fujifilm portable ultrasonic flowmeter can achieve 0.5% accuracy, and many of its advantages will be gradually reflected in future industry applications. Of course, there are many people who will refute the many shortcomings of ultrasonic flowmeters, so I hope that when selecting a model, you should clarify your own application conditions, and then choose the right flow meter according to the conditions. Choose instruments with different precision. Only the instrument that meets the actual needs of its own work is a good instrument.

There are many brands of electromagnetic flowmeters, and generally its accuracy level is proportional to the price, and ultrasonic flowmeters are also divided into multiple levels of brands, and their corresponding accuracy and reliability are also very different. Therefore, in the selection process of instruments, we should be based on our own actual needs.