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Why instrument transmission is via 4-20 ma not 0-20ma or 0-16ma?‎

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Diploma in instrumentation I.T.I in electrical With6year global experience‎

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Answer added by  Shilpa Joshi, Instrumentation and Control Engineer , Thermax
7 years ago

The 4-20 mA signal is used instead of 0-20 mA oR 0-16 mA for reasons as below: 1. For a 2 wire transmitter the device itselg requires some power for operation which is eq ... See More

 

Answer added by  Deleted user
6 years ago

Cavitation is the formation of bubbles or cavities in liquid, developed in areas of relatively low pressure around an impeller. The imploding or collapsing of these bubbl ... See More