Hi, I am a writer at http://3dprinterchat.com and we often test filament. So one of our writers has come up with a testing system that requires no special tools so that you can see how well you filament performs with a score. Take a look and please let us know what you think: https://3dprinterchat.com/2016/03/how-to-rate-your-3d-printing-filament/
How about using a melt index instruments used in labs to measure flow rate at varying temps