.
Plus isolation, and it?s a big plus.
This is related to the ?RF everywhere thread?, since RF is the best iso lation technique.
Current loop means the voltage can be at any level; so, you cannot tie the common ground to either end of the resistor. If you tie the measuring micr o?s ground to one end of the resistor, the micro must be isolated from an y other equipments or PCs.
RF is the best way to get the signal out of the measuring micro. You can R F it to another USB based micro.