How to Choose Suitable Electromagnetic Flowmeters?
The use of electromagnetic flowmeters have become popular in recent years in our daily life and industrial technology and management departments, with demand increasing for various industries, such as chemical industry, environmental protection, metallurgy, medicine, papermaking, water supply, drainage and etc. These flowmeters generally consist of 4 parts, electrode, liner, sensor and transmitter. There are 2 basic wetted parts that we worry about with a magnetic flow meter. You know one of them is the liner and the other is the electrode. Correspondingly, there are various types on the market in terms of their electrodes and liners. Different ones work well for different reasons. So some people may wonder how to choose a suitable flow meter for their specific use.
Choose According to Medium to be Measured
Actually, electromagnetic flowmeters can measure the flow rate of conductive medium, such as water, waste water, corrosive liquid, pulp, mud, some acid and alkaline solutions. Different liners are available for different medium to be measure, like soft rubber, hard rubber, neophene, polyrethane or PTFE. So firstly, we decide the flow meter according to the medium. The price of different liner varies. The price of these 5 materials varies, if to measure water, as the first 3 are at relatively low cost, you don’t have high levels of chemical compatibility that you have to worry about, there is no reason that you can’t go with the relatively low cost and economical design.
Choosing the suitable electrode for an electromagnetic flowmeter is also important, as it also decides the price and application. Usually stainless steel or hastelloy is mostly used. The former one, usually for general purpose but is not suitable for strong acids and alkali, not recommended for salt water and brine. For hastelloy, it has good all-round corrosion resistance, higher resistance to locallized corrosion,which is superior to stainless steel.
No matter the price of electromagnetic flowmeter is low or high, choose the most suitable one according to the application. For example, if we use it for city sewage, we generally recommend rubber liner and stainless steel electrode considering the price.