I'm looking for a sensor to input spindle load into my Camsoft CNC control. I'm using a VFD and would like to sense the load or current and hook up to an analog input.

I'm finding a bewildering selection from $20 to $800. At this point, I'm leaning toward purchase of a current transducer in McMaster Carr catalog #110 page 657. Part 6583K32 ($114) provides a 0 - 10 volt DC output.

Good choice? Is there a better option?

Karl