DN40 Electro Magnetic Flow Meter Stainless Steel 304 Material 4-20mA And Pulse Output

             DN40 Electro Magnetic Flow Meter Stainless Steel 304 Material 4-20mA And Pulse Output

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 of using Electromagnetic Flow Meters
The main advantages of using magmeters is that they require less maintenance, and can be ordered for very large line sizes. Some can be installed with a simple hot tap which does not require shutting down the line. Mag meters also have the benefit of adding a level of trust for consumers: they hold the service provider accountable for the actual water being produced and/or billed. These efforts will assist with preservation of our water resources while improving profitability for the utility.
 

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. In-Line Magnetic Flow Meters installation Considerations

In-line flow meters do not require as much straight pipe as the insertion styles. A minimum of 5 to 10 pipe diameters of straight run upstream and 1 to 2 diameters downstream is recommended. In vertical pipe runs, flow should always run up and not down. These flow meters are very sensitive to air bubbles. The magnetic flow meter cannot distinguish entrained air from the process fluid; therefore, air bubbles will cause the mag flow meter to read high.

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.