4-20mA Potentiometer Question

I just recently bought an arduino uno to mess around with and I want to hook up a potentiometer from a machine of mine. I’ve never really dealt with them before and this one is one has 3 marking on it for the pins. They are 0V, Ub 10-30V, and Out 4-20mA. Im assuming the 4-20mA is the signal and Ub would be the power required for it to work? Does anyone know how I would have to hook the poti up to the arduino for it to read the proper values?? Any help is greatly appreciated!

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Leo..