A guy contacted me a few weeks ago with a diferent aproach to an old method of leak detection.
He is using ultra-sonics to detect leaks, but using a microP to analize the bubble size and strength in the liquid line, from a software model for a trained unit it can determine if the detected bubbles are what it expects having an accuracy of 3%!!!

The guy now wants to see if it can be adapted for Reefers, personaly I think the cycle would not be stable long enough to train let alone actualy run a a comparison.