Electromagnetic Flow Meter

How Magnetic Flow meters Work

Magnetic flow meters use Faraday’s Law of Electromagnetic Induction to determine the flow of liquid in a pipe. In a magnetic flow meter, a magnetic field is generated and channeled into the liquid flowing through the pipe. Following Faraday’s Law, flow of a conductive liquid through the magnetic field will cause a voltage signal to be sensed by electrodes located on the flow tube walls. When the fluid moves faster, more voltage is generated. Faraday’s Law states that the voltage generated is proportional to the movement of the flowing liquid. The electronic transmitter processes the voltage signal to determine liquid flow.

ELECTRICAL CONDUCTIVITY

There is one important point when using electromagnetic flow meters. Because electromagnetic flow meters are based on the laws of electromagnetic induction, conductive liquids are the only liquids for which flow can be detected. Whether it is a conductive liquid or not is determined by the presence of electrical conductivity. So, just what is electrical conductivity?

Electrical conductivity generally is a value that expresses the ease for electricity to flow. The opposite numerical value is resistivity, which expresses the level of difficulty for electricity to flow. For units, S/cm (siemens per centimeter) is primarily used. To determine how easily electricity will flow, 1 cm² electrodes are placed 1 cm apart. Using tap water at 100 to 200 μS/cm, mineral water at 500 μS/cm or more, and pure water at 0.1 μS/cm or less as samples, we can provide examples of actual measured electrical conductivity.

Application :  Water/Waste water Industry, Chemical, Food & Beverage, Oil & Gas (although not for oil and gas fluids but in support of the processes),Power, Pulp & Paper, Metals & Mining, and Pharmaceutical.

Specification :

Size : DN15~2200 ( 1/2"  to 88" )

Accuracy : +/- 0.5%

Output :  4-20mA/Pulse ;Hart ; Communication RS485 

Type :  Remote & Compact Type  Flange

Standard : DIN  / ANSI 150 /JIS

Temperature :  -20~120Deg C

Liner : PTFE/PU /PFA/Rubber/etc...

Power Supply :  85-250Vac/24VDC

for more information 

Email : info.flowsys@lkssb.com.my