Before we buy something in our daily life, we will fully understand such things. Electromagnetic flow meters are no exception. If users are interested in purchasing, they must fully understand it before purchasing, the principle and environment of use. It is necessary to have a general understanding, so that it is convenient to purchase. The principle of electromagnetic flow meter is Faraday's law of electromagnetic induction, which is mainly composed of measuring tube, electrode, excitation coil, iron core and yoke shell, mainly for conducting electricity in closed pipeline. The volumetric flow rate in a liquid or slurry can be measured, including some highly corrosive liquids. What should we pay attention to when preparing the electromagnetic flowmeter?

Electromagnetic flowmeter primary selection：

1. Determine whether to use an electromagnetic flowmeter based on the name and nature of the measured medium.

Note: Electromagnetic flowmeters can only measure the flow of conductive liquids, while gases, oils and most organic liquids are not in the case of general conductive liquids.

2. Determine the electrode material according to the nature of the medium that is known.

Note: The company generally provides four kinds of electrodes, such as stainless steel, Hastelloy, titanium and tantalum. Which kind of electrode should be used according to the nature of the medium.

3. Determine whether rubber or PTFE liner is used according to the temperature of the medium.

Note: rubber temperature should not exceed 80℃;

PTFE temperature resistant 150℃, instant resistance to 180℃;

Urban sewage can generally be rubber lining and stainless steel electrodes.

4.According to the medium pressure, select the body flange specifications

Note: The specifications of the electromagnetic flange are usually when the diameter is from DN10-250, the rated pressure of the flange is ≤1.6Mpa;

When the diameter is from DN250-1000, the rated pressure of the flange is ≤1.0Mpa;

When the actual pressure of the medium is higher than the above-mentioned pipe diameter-pressure corresponding range, it is a special order, but the higher pressure shall not exceed 6.4Mpa.

5.Determine the conductivity of the medium

Note: (1) The conductivity of the electromagnetic flowmeter shall not be less than 5uS/cm;

(2) The conductivity of tap water is about tens to hundreds of uS/cm. Generally, boiler soft water (deionized water) conducts electricity, and pure water (highly distilled water) does not conduct electricity;

(3) The conductivity of gases, oils and most organic liquids is much lower than 5 uS/cm and is not conductive.

The above are some of the things that users need to know before purchasing the electromagnetic flowmeter. Knowing these matters will help users better choose the electromagnetic flowmeter to match the needs of the users. We are producing as a professional flowmeter. Manufacturers can provide more professional electromagnetic flowmeter purchase suggestions, and the production of electromagnetic flowmeters is also quite reliable.