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Anonymous Poster #1

Level Transmitter

08/05/2012 5:23 AM

FEED design proposed a Capacitance type Level tranmitter for an open drain vessel. The problem is there is no space to remove the probe from the top.

A DP type level transmitter will be Ok for this application? The fluid contained in the vessel is a mixture of oil/water/gas.

Any suggestions ..
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Iris
Guru

Join Date: Jul 2010
Posts: 669
Good Answers: 176
#1

Re: Level transmitter

08/05/2012 8:46 AM

You will probably be very disappointed and will not like the performance of a DP level transmitter for a mixture of oil and water.

DP measures head pressure. Level is inferred from head pressure by a compensation calculation using the density of the fluid. If the density changes, the indicated level changes for the same head pressure measurement.

It is very unlikely that the mixture will always be the same percentages of water, oil and gas. The mixture ratios will change over time, the density will change and the level readings will never be correct.
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ampt
Active Contributor

Join Date: Jun 2011
Posts: 10
#2

Re: Level Transmitter

08/06/2012 12:27 PM

Have tried Fluid Components International in San Marcos?
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altennant
Associate

Join Date: Sep 2006
Posts: 47
Good Answers: 1
#3

Re: Level Transmitter

08/10/2012 8:55 AM

I agree with Iris if the density can change the level measurement will not be very accurate or realible.

Some manufacturers use a flexible weighted rope type capacitance probe that can easily be removed with limited head room.
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q_qamar4u
Active Contributor

Join Date: Nov 2010
Location: INDIA
Posts: 19
#4

Re: Level Transmitter

08/21/2012 3:00 AM

YOU can use radar type level transmitter.

__________________
 SHAIKH QAMAR AZAM // INSTRUMENT ENGINEER
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altennant (1); ampt (1); Iris (1); q_qamar4u (1)

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