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instrumentationengineer
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Join Date: May 2008
Posts: 14

level measurement of viscose in closed tank

07/21/2008 5:18 AM

dear sirs/frnds,

I have got an application where i need to measure Viscose level in a closed tank, above the viscose surface Vacuum is maintained(710mmHg).What kind of Transmitter to be used & how about the calibration. Consider tank height as 40in & SG of viscose is 1.34.
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PWSlack
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#1

Re: level measurement of viscose in closed tank

07/21/2008 6:39 AM

Radar? Endress + Hauser (usual disclaimer) can probably provide something appropriate.

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Vulcan
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Philippines - Member - New Member Engineering Fields - Instrumentation Engineering - New Member Engineering Fields - Control Engineering - Who am I?

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#2

Re: level measurement of viscose in closed tank

07/21/2008 8:07 AM

You're going to need a differential pressure type of level transmitter. Personally, I'd use one that uses diaphragm seals.

No wait! I'd prefer radar level.

Wait! Use load cells!

Ah! It's up to you. The manual will usually have calibration instructions in it.

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instrumentationengineer
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Join Date: May 2008
Posts: 14
#4
In reply to #2

Re: level measurement of viscose in closed tank

07/22/2008 12:28 AM

The DP transmitter with flange mounting is gud suggestion.

How about the calibration..

how much will be LRV & URV>
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Vulcan
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#5
In reply to #4

Re: level measurement of viscose in closed tank

07/22/2008 6:58 AM

Pardon my saying but if you want to live up to your user name (instrumentationengineer), you'll have to learn how to find information.

If you have a manual for a differential pressure transmitter in your place (any brand), it should have calibration details there. Alternatively, you can go an instrument manufacturer's website (Foxboro, Rosemount, Yokogawa, Endress & Hauser, etc) and download a manual from them.

Calibration for all differential pressure transmitters are the same regardless of the brand. The methods may differ slightly but the calculations will be the same.

Happy hunting!

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wrenchpuller
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Join Date: Dec 2007
Location: texas
Posts: 92
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#3

Re: level measurement of viscose in closed tank

07/21/2008 10:54 PM

Hi, there is many good options.The calibration method will depend on the type the transmitter. I personally prefer radar transmitters when the application permits.I wouldn't use a displacer type transmitter in this kind of service. Please take this information ONLY as my personal opinion..Thank you

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feridun
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Join Date: Jun 2008
Location: TR
Posts: 142
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#6

Re: level measurement of viscose in closed tank

07/22/2008 8:16 PM

Simply a capacitive type level transmitter suits this application and it will be the most economical one by my opinion.

Two point calibration is enough :The low output while tank is empty and the 2nd while thak is full.

regards.
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vishal.ratnakar
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Engineering Fields - Instrumentation Engineering - New Member

Join Date: Apr 2008
Posts: 10
#7

Re: level measurement of viscose in closed tank

07/23/2008 3:35 PM

Hello everyone! One problem with the differential pressure transmitters will be the excess "dead area" and the limitations on flanges at the lower point.... I would suggest a Rosemount 5600 series radar - check the Emerson site for details
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feridun (1); instrumentationengineer (1); PWSlack (1); vishal.ratnakar (1); Vulcan (2); wrenchpuller (1)

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