Why an electromagnetic flow meter cannot be used for gases,
steam and oil flow measurements?
Answer Posted / rajesh l parmar
Electromagnetic flow meter works on a principal of
faraday’s law or electromagnetic induction which states
that when a current carrying coinductor moves through a
stationary traverse magnetic field, then e.m.f. is induced
between the ends of the conductor and this e.m.f. is
proportional to relative velocity between conductor and
magnetic field
E = BLV where
B = magnetic induction
L = length of a conductor
V = velocity of the conductor relative to the magnetic
field
It consists of a flow tube inside a pipe which carries a
fluid flow. So when the fluid is passed through the flow
tube, it is visualized as a current carrying conductor
having a length equal to inside diameter of the flow tube.
Now the gas, steam and oils are having low electrical
conductance. So no E.M.F. can be generated in such case. So
electromagnetic flow meters can not be used for metering
gas, oil and steam.
In general electromagnetic flow meters can only be used to
measure the flow of fluid which are sufficient conductive
to generate e.m.f.
Is This Answer Correct ? | 0 Yes | 0 No |
Post New Answer View All Answers
When using a pumping loop to mix two miscible fluids in a tank, when can the content are considered well mixed?
Why is post-weld heat treatment sometimes necessary for welded vessels?
What are some common causes of gas pipeline vibration 20 carbon steel line?
What is a common source of error in determining the percent spent caustic in refinery applications?
What are the methods involved to test helium leak testing in a vacuum system?
What is the maximum recommended velocity for steam in a plant pipe network?
what is the apt definitions for apparent power ,active power and reactive power?and explanation about different types of lamps?
What are some common precipitating agents used to remove metals from aqueous waste streams?
What are the effects of oils on the properties of Polyolefins?
design calculations for reactor
Explain the steps taken to operate a tank-blanketing valve?
What are the various utilities of the process plant?
sir,please give me some exam paper for referance. Thanks & Regards,
Explain the reasons of removal of particles from effluent gas?
How can we derive power factor equation p=vi cos phi?