I would like some assistance to select the right sensor/transducer to monitor current from an inverter to the spindle motor it feeds. If it is possible to get RPM signals from the inverter please advice on how to go about it. Please suggest the most suitable sensor/s to achieve both current and RPM (if possible), if not, just current. Inverter: Mitsubishi Transistorized Inverter (FR-A500-3.7K) Inverter output voltage: 200 to 240 VAC 3-phase (u,v,w terminals pg 12) 50/60 Hz Attached is some technical info for the inverter. Pages 220, 12, 41, 2 & 36 may be of considerable interest. Page numbers mentioned here are the page numbers printed at the bottom of each page in the attached technical manual for the inverter. Thank you for taking the time to help.