why do we use 4-20mA as o/p and why don't use 0-20mA or 5- 21mA?

3 Answers  

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in transmiters(rose mount) how to check output 4-20ma ? and input 24v? i need exact explanation?

2 Answers   Adhunik,

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what is difference between RTD and Thermocouple?

2 Answers  

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what is the difference betwwen the 2wire level transmitter and 4wire level transmitter??and their applications also??

2 Answers  

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I m appointed as an automation trainee engineer in small firm in that I am only the one , my company give me a project on s7-200 as i m beginner I don't know how to program so please send me the helpful site so that I complete my project before deadline....please help me out in this critical situation.

0 Answers  

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Can anybody tell which type of quections are asked in interview for projects? plz give its urgent.....!

2 Answers  

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what are the documentation and instrument identification system used to identify the correct device to be calibrated? name atleast three.

1 Answers  

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there are two candidates p and q in an election.During the campaign,40% of the voters promised to vote for P ,and rest for Q.however, on the day of election 15% of the voter went back on their promise to vote for P and instead voted for Q. 25% of the voters went back on their promise to vote for Q and instead voted for P.suppose,P lost by two votes,then what was the total no. of voters.

4 Answers   GATE,

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What is Difference between PLC and CNC ?

2 Answers  

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What is possitive and negative feedback?

3 Answers   KNPC,

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how we can calibrate an Interface level transmitter online

2 Answers   L&T,

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which type of zones used for boiler? & why ?

0 Answers  

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