Isn't there another data logger available that reads more frequently than the ET and medusa. I remember reading about one but it was being used for a scuba scooter. Very basic with near no versatility, it just took readings at specified intervals and the memory cleared upon upload of data to computer. I'll see if I can find it.
I'm not sure what kind of sensor the medusa uses but I sent an email to them and there reply was the shunt is used to measure the current. They said it would be OK to shorten the sensor wire e.i. cut off the bullet connector and solder it directly to a motor phase. I still haven't used it yet
Found it- the BNB DPR 150. Some are happy with it some are not. Someone reckoned it can sample up to 50 times per second though I haven't checked on that.
Has BNB gone out of business? I can't get to there website.