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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What is the maximum operative of Drive ?

2 Answers   Reddy Labs,

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Isometric drawings are generated during _________________ phase of a project

0 Answers  

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what is zero and span ?

0 Answers  

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How to Calibrate Penumatic Transmitter.LRV= -60 URV= -20.Can u give me Answer.

9 Answers   ABB,

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which type of filter gives the constant phase characteristics?

0 Answers  

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what is the principle of ultrasonic flowmwter and radar type flowmeter?

4 Answers  

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how many parts of valve positioner?

1 Answers   Kentz,

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Define all the process Variable and state their unit of measurement. ?

0 Answers  

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for indiacation of turbine(china) bearing temperature what type of sensor will be used(i.e. rtd or thermocouple or themister ) ? why it is ? i need clear explanation ?

2 Answers  

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applications of 1-5v and 4-20ma?

4 Answers  

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why k factor is important to know in flow transmitter. if we don,t know k factor what will be issue we can face .

1 Answers   Flour Tech Engineers (P) Ltd,

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