I have found the answer, the food saver goes to 20 inches Hg according to some hee haw on you tube.
Vacuum is measured in many ways.
The reason I am doing this is to be able to store dry goods in jars and reseal them so they last longer like pepper powder, spices, herbs, beans rice and so on.
Here is a link for the curious
I love engineering tool box.
Worth
https://www.google.com/url?sa=t&rct=...YExyCWCIfMd67Q