LDG Electromagnetic Flowmeter

Overview

LDG series of intelligent electromagnetic flowmeter is made according to the law of electromagnetic induction, which is used to measure the volume flow of conducting liquid in the pipe, such as water, sewage, slurry, ore pulp, acid, alkali, salt liquids and food slurry, etc. It is widely used in the industries of petrochemical, mining, coal and water conservancy which solve the drainage, sewage treatment problems.

Operating Principle

The electromagnetic flowmeter is based on the theory of Faraday's law of electromagnetic induction.

When a conductor cuts magnetic line of force, it will generate EMF (Electromotive Force). According to this principle, the volume of flowing conductive fluid in pipe can be measured, flowing direction of conductive fluid is perpendicular to the direction of electromagnetic field, an alternating magnetic field is applied in a direction which is perpendicular to the conduit, and install a pair of electrodes on both sides of the conduit’s inner surface which has insulated lining. When the conductive liquid goes through the conduit, both electrodes generate EMF because magnetic line of force is being cut. EMF is proportional to the flow, finally, the flow can be exported.

Features

1. Measurement is not influenced by the changes of liquid density, viscosity, pressure and conductivity.

2. No active and choked flow parts, no pressure loss, no blocking, measurable for the liquid with fiber, solid particles and suspended solids.

3. Reaction of the instrument is sensitive. The measuring range, the flow rate is 0.3-15m/s, conductive liquids of conductivity≥5μs/cm all can be measured, and measuring range can be selected arbitrarily.

4. The instrument uses a low-frequency three-state square-wave excitation technology, advanced small-signal processing technology and software technology, so it has the strong anti-interference, high precision, stable and reliable.

5. The instrument is not affected by the flow direction of liquid, can measure as both forward and reverse installation, and easy to install, less demanding for the straight pipeline.

6. Corrosion resistance and abrasion resistance of electrode and the lining material of electromagnetic flow meter are excellent, with a long service life. According to the special condition requirements of users, we can produce electromagnetic flowmeters, for example, electromagnetic flowmeter of submerged type.

7. Impact resistance and vibration resistance of the instrument are excellent.

8. Not measurable for gas and non-conducting liquids.

Main Technical Parameters