Why 4 to 20ma is used for Signal Transmission in Instrumentation. 4-20ma current signal.4to 20ma

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4 to 20ma is used for Signal Transmission in Instrumentation.
The 4-20 mA current loop has been the standard for signal transmission and electronic control in control systems
a 4-20 mA current loop is a very common method to convey the sensor data acquired.
As major as the 4-20 mA loop standard has become in the process control industry, many do not understand the fundamentals of its setup and use.
Not knowing the basics could potentially cost you money when it comes time to make decisions about process display and control.
To Read our blog on this topic, visit our website:
www.instrumentationacademy.co...
#4to20ma #4to20masignal

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I was searched so many channels to know about why instruments use 4-20ma signals but I didn't in understand clearly but by this video i understood.
Ta

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[@AK-IT]

Amazing video. Never understood why there were Process Meters 4-20mA, now I know that it is to measure the specifically the process plant signals for transmitters to PLCʻs.
The setup is similar to Automotive. Field Instruments to PLC to Final Control Element would be Sensors to ECM to Components.

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Amazing video. Thank you for putting it together.

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Good Instrumentation Basic information.

[@nidhiguptaietstudent4835]

Very good explanation. Pls reply my doubts:
What if we take lower limit 2mA instead of 4mA,why only 4mA?
Why upper limit is only 20 mA not any other value ?

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How long can we installed a sensor using 4-20mA signal?

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Ma'am ..why we use only 20mA ...why not use ...25..30mA.. please answer me ma'am....this question is asked me in interview.

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Just a standard

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