Instrument Introduction

Supmea electromagnetic flowmeter LFM3100 is a fully intelligent flowmeter developed and researched with advanced technology. It is very different from traditional analog or non-intelligent electromagnetic flowmeters, especially in terms of measurement accuracy, reliability, stability, usage functions and service life.

The principle of electromagnetic flowmeter:

The working principle of electromagnetic flowmeter is based on Faraday's law of electromagnetic induction. In the electromagnetic flowmeter, the conductive medium in the measuring tube is equivalent to the conductive metal rod in Faraday's test, and the two electromagnetic coils at the upper and lower ends generate a constant magnetic field. When the conductive medium flows through, an induced voltage is generated (the working principle is shown in the figure below). The two electrodes inside the pipe measure the induced voltage. The measuring pipe is electromagnetically isolated from the fluid and the measuring electrode by a non-conductive lining (rubber, Teflon, etc.).

Product Features

l Single chip microcomputer and surface mount technology used

l Strong anti-interference ability, reliable measurement and high precision

l High-definition backlit LCD display

l Measurement accuracy ≤0.5%

l RS232, RS485, Hart or Modbus optional

l With self-check function

Unaffected by changes in fluid density, viscosity, temperature, pressure and conductivity  

Electromagnetic flow selection:

Sensor part:

1. Flow rate: determine the flow meter with the largest flow rate according to the maximum flow rate.

2. Determine the caliber of the flow meter according to the flow rate and industrial pipeline size. Generally, a flow meter that matches the pipeline is selected.

3. Choose the lining of the flow meter according to the characteristics of the medium being measured, such as temperature, corrosiveness, whether there is negative pressure in the pipeline, etc. Common linings include PTFE, soft rubber, hard rubber, PFA, ceramics, etc.

4. Select the material of the measuring electrode according to the characteristics of the medium. Generally, there are 304, 316, Hastelloy, titanium, tantalum, etc.

5. Select the pressure level of the flanges connected on both sides according to the pressure level of the process pipeline.

6. Select the protection level. If the sensor is completely underwater, select IP68.

Transmitter part:

1. Determine whether to choose integrated or split type according to the requirements of the installation location.

2. What type of output is required, 4-20 mA signal, Hart, Profibus PA, FF, etc.

3. Whether explosion-proof requirements are required.