Water Electromagnetic Flowmeter Cheap Electro Magnetic Flow Meter

Product Specification

                   Water Electromagnetic Flowmeter Cheap Electro Magnetic Flow Meter​

1. What are Electromagnetic Flow Meters?
Electromagnetic flow meters, also called mag meters or magnetic meters, are volumetric flow meters which do not have any moving parts to wear, reducing the need for maintenance or replacement. Accuracy over a wide flow range can be as good as ± 0.5% of flow rate or better.

They feature an obstruction-free design which eliminates flow impediment, and operate with electrodes embedded on opposite sides of the flow tube or sensor to pick up the signal. Mag meters perform extremely well in many municipal and processing applications, and have become the meter of choice for measuring conductive liquids such as water or slurry.

2.  Advantages & Disadantages Electromagnetic Flow Meters
There are numerous benefits to using electromagnetic flowmeters to perform fluid flow measurements. They are generally non-invasive and have no moving parts, reducing the risk of breakdowns and the frequency of repairs. A decrease in flowmeter pressure is also usually no greater than that of an equivalent pipe length, reducing the piping costs. Some of the other major advantages provided by magnetic flowmeters include:

• Power usage is relatively low, with electrical power requirements as low as 15 watts for some models.
• They are mechanically obstructionless and can be equipped with abrasion-resistant liners, making them effective for measuring slurries and other erosive fluids.
• They are capable of dealing with most kinds of acids and bases, as well as water and water-based solutions, due to lining materials that are both insulators and have corrosion resistance.
• Relatively small amounts of electrode metals are needed for magnetic flowmeters.
• They can measure both very low flows and very high volume flow rates, with a minimum diameter of roughly 0.125 inches and a maximum volume of up to 10 cubic feet.
• They can usually measure multidirectional flow, either upstream or downstream.

Despite these advantages, magnetic flowmeters also present certain difficulties for flow rate measurement. These flowmeters are only effective on conductive fluids, and materials such as unmixed hydrocarbons and gases cannot be measured. However, magnetic materials themselves may also present problems, as hydrodynamic effects can alter the normal flow pattern and disturb the velocity rate enough to interfere with operations. Depending on their size and capacity, magnetic flowmeters can be relatively heavy, and those with higher corrosion and abrasion resistance can be expensive.

3.What is the operating principle of a magnetic flow meter?

The operation of a magnetic flow meter or mag meter is based upon Faraday's Law, which states that the voltage induced across any conductor as it moves at right angles through a magnetic field is proportional to the velocity of that conductor.

As applied to the design of magnetic flow meters, Faraday’s Law indicates that signal voltage (E) is dependent on the average liquid velocity (V) the magnetic field strength (B) and the length of the conductor (D) (which in this instance is the distance between the electrodes).

Faraday's Formula

E is proportional to V x B x D where:

E = The voltage generated in a conductor
V = The velocity of the conductor
B = The magnetic field strength
D = The length of the conductor

To apply this principle to flow measurement with a magnetic flow meter, it is necessary first to state that the fluid being measured must be electrically conductive for the Faraday principle to apply.

As applied to the design of magnetic flow meters, Faraday's Law indicates that signal voltage (E) is dependent on the average liquid velocity (V) the magnetic field strength (B) and the length of the conductor (D) (which in this instance is the distance between the electrodes).

In the case of wafer-style magnetic flow meters, a magnetic field is established throughout the entire cross-section of the flow tube. If this magnetic field is considered as the measuring element of the magnetic flow meter, it can be seen that the measuring element is exposed to the hydraulic conditions throughout the entire cross-section of the flow meter.

With insertion-style flow meters, the magnetic field radiates outward from the inserted probe.

4. Specification

5. How to select and install a magnetic flow meter?

The key questions which need to be answered before selecting a magnetic flow meter are:

• Is the fluid conductive or water based?
• Is the fluid or slurry abrasive?
• Do you require an integral display or remote display?
• Do you require an analog output?
• What is the minimum and maximum flow rate for the flow meter?
• What is the minimum and maximum process pressure?
• What is the minimum and maximum process temperature?
• Is the fluid chemically compatible with the flow meter wetted parts?
• What is the size of the pipe?
• Is the pipe always full?

6. Configuration

7. Maintance

The electromagnetic flowmeter has a self-diagnostic function. In addition to power supply and hardware circuit failures, the system also alarms other failures in general use. These messages will give corresponding prompts in the lower right corner of the screen.

1 Maintenance and repair
a) The sensor installation site should meet the requirements of Section 4, please keep the housing tidy;
b) The transmitter should be placed in a clean, ventilated and dry place;
c) It needs to be inspected every two years. For high-precision users, the instrument needs to be submitted for review.

2 Transportation and storage
a) The instrument must be packaged before transportation, and be handled with care when loading and unloading.
b) The storage place must be dry and ventilated to avoid corrosive gases, and the ambient temperature should not be too low or too high;
c) The storage time should not exceed three years.

8.Company Profile

Melan Measurement & Control Instruments is located in Shanghai City. It is a high-tech manufacturer specialized in the design, development, manufacturing and sale of measurement and control instruments.

Our products are widely used in various fields, including electricity, chemical industry, metallurgy, brewing, oil and gas, textile, water conservancy, environmential protection, etc.

We own independent-courtyard modemized manufacturing workshops and an open office building. Melan has accumlated production and management experience in instruments from European and American and domestic famous companies.

We own first-class talent team, and all the products have reached advanced level at home and abroad. We provide our customers with complete and professional test control solutions and high-tech and high-quality products.

Melan is your reliable friend and partner. We are willing to try our best as dedication and perfection as motivation.

9. FAQ

Q: How long will you give me the reply?
A: We will contact you in 5 hours as soon as we can.

Q: What is the warranty of your prducts?
A: Our warranty is 12 months after the shipping date.

Q: What is the lead time of your products?
A: Normally our factory lead time is 10-12 working days.

Q: Can I OEM your products?
A: OEM and ODM customization are welcomed.

Q: What is your MOQ?
A: We have no MOQ limit, small quantity order is acceptable.

Q:What is the transport?
A: Express such as DHL, FedEx, UPS for freight prepaid, and we can also use your own courier account to do the freight collect. For more goods we can arrange by air or by sea.