in instrumentation why we are using 4-20mA , why not voltage ? if somebody design a instrument which works on voltage then can we use that instrument?

6 Answers  

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what is the full formof HART

7 Answers  

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What is the difference between HMI and Scada?

4 Answers   Schneider,

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Sir,I am going to sit for IOCL written test exam. recently.Can anyone tell me the name of 'Objective type Question Book on Instrumentation Engineering ' which will help me. Pl. mail to bidyut_71@rediffmail.com / bidyut.saha2008@indiatimes.com / bidyut.saha09@yahoo.in

0 Answers  

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how we calculate the range of flow from a dp?i mean if we have a dp,3810mm h2o.how much flow ranges we can use for this DP?

1 Answers  

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What is DDC-MIS?

3 Answers  

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what is the diffrence between pressure safety valve & pressure relief valve....pls

0 Answers   Oil India,

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Why we are using DPT(Differential Pressure Transmitter) in separator instead of level trasmitter?

0 Answers  

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Hi all, I am Mohamed from Algeria, I'm a senior Technician qualified in instrumentation. I work in an international petroleum and gas company (SONATRACH: Separation of associated gas from crude oil. Production of condensate, LPG and re-injection of dry gas) within the regulation & Control instrumentation department.I am interested for working in Qatar Petrochemical Company (QAPCO) in Qatar.Now,I am seeking a position, which is an opportunity for me to put my experience to good use and actually participate in running on this company. So, Can anyone help how to contact this company? Thanks Mohamed, mahad8331@gmail.com

1 Answers  

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What is a flow meter?

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what is the criteria to decide conductor size of a cable ?

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how to measure level under ground tank ? which type of transmitter very accuracy ?

3 Answers   Biocon,

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