How did STRATAVAC get its name? The prefix Strata is for Stratum. Webster's Dictionary defines Strata as “a layer of material, naturally or artificially formed, often one of a number of parallel layers one upon another”. STRATAVAC, DigiVac’s Multi-Gauge Vacuum Controller, is customizable for a number of Vacuum Applications based on its ability to add additional driver cards to the vacuum instrument. And "Vac" for, well, vacuum ;). Strata (many layers) of Vac (vacuum) capabilities. Now, let's dig into a few of the DigiVac STRATAVAC and STRATAVAC Touch lines features and benefits.