My flow sensor's output is 4-20mA which present 1-55GPM. How could I read it with arduino? Let me add more info here. I use a 250 omh resistance to get a 1-5V output. I use voltage meter measure the output is 1.212V where the flow rate is 3.07 GPM. How could I use arduino acquire data and program …

How to read a sensor help needed

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