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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?
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Answer Posted / himanshu
4-20 mamps is best choice because interference level is
minimum in current application where as in 0-10 V it is
comparatively high.Thus in using 4-20 mamps signal is
distortionless.
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