why 4 to 20 ma ,why not 0 to 20 or 3 to 15 or anything

19 Answers   Honeywell, TCS, TN,

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which type inter lock use in petrochemical refinery,and oil & gas?

0 Answers  

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what is loop?

4 Answers  

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What is loop or pigtail in an impulse line?

8 Answers   Qatar Airlines, Qatar Petroleums,

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If I want to buy a pressure switch & 3-way valve for hot water application then witch parameter I should consider.

1 Answers  

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plz send me general of ongc

0 Answers   ONGC,

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what is the formula for calculating milliampere at different pressure points for eg 4-20 ma = 3-15 psi but if i have to check the ma at 4.6 ma?

4 Answers  

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please explain clearly in PID controller if We increase P only what will be action of the contrlere.

1 Answers   IMECO,

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HELLO FRIENDS plz tell me which are the PROTOCOLS we are using in PLC

3 Answers  

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what is vfd(variable frequency drive)?type of vfd.

2 Answers  

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What is the meaning of Dry contact and Wet Contact related to to sensors?

5 Answers   Emerson, Google,

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What are the logic behind 2x2 and 2x3 logic and more when ask in interviews

1 Answers   Reliance,

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