what is the difference between CPC and i/p converter

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what is the difference between CPC and i/p converter..

Answer / bimalendu sarkar

the basic difference between them is that cpc has two
inputs- current( 20ma to 160ma) and a hydraulic
input/output whereas an i/p (E/p) converter has a current
(4ma - 20ma) and a pneumatic input/output.

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