Interfacing 4-20 mA sensors is easy with Arduinos - do a search on this forum, it's been discussed many times, including circuits on how to convert the current into a voltage that the Arduino can read on it's analog pin.
Interfacing 4-20 mA sensors is easy with Arduinos - do a search on this forum, it's been discussed many times, including circuits on how to convert the current into a voltage that the Arduino can read on it's analog pin.