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Arduino Forum How o measure 4-20 mA Current

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oksbwn over 9 years ago

I need to measure 4-20mA current output from some sensors. How can i do that ? Currently i use resistive drop to get the analog voltage and provide that to ADC of the controller. Are their any current input ADC ?

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kulky64 over 9 years ago +2

That's basically how you do it. You can check various manufacturers reference designs, for example: Analog Devices: http://www.analog.com/en/design-center/reference-designs/hardware-reference-design/circuits…
uscdadnyc over 9 years ago in reply to oksbwn +2

Is the situation: (a) Measuring DC Current (at Currents mentioned) AS you would using a (temporary) Test Instrument? OR (b) Circuitry that you would build that attaches to the circuitry that you want to…
Robert Peter Oakes over 9 years ago +2

4-20mA is a nice standard for instrumentation measurement and is used in industry extensively. the nice thing about it is it has automatic fault detections as zero = 4mA, any less than 4 means an error…

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prodegyprogeny over 7 years ago

i was looking for something lik this to and i found this on tindie
https://www.tindie.com/products/Circuitar/adc-4-20-nanoshield-ads1115-for-4-20ma-sensors/
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prodegyprogeny over 7 years ago

i was looking for something lik this to and i found this on tindie
https://www.tindie.com/products/Circuitar/adc-4-20-nanoshield-ads1115-for-4-20ma-sensors/
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