So, yes, there are several well functioning methods to measure the action and relief.
The main point here is that you will just numbers, and these numbers are not necessarily closely related with 1. how well the guitar will play for you and 2. how well it will sound.
These things depend not only on the action, but also on several other parameters that can influence how a guitar actually plays and sounds with a given action: mainly top stiffness, neck stiffness, maybe height of the strings over the top (no pun intended!) etc.
So in the end you will need some experimentation with action and string tension and brand to arrive at an optimal solution (and what optimal means will also change with time). The research must be centered around the instrument you play and your own playing, and not eg. around a given string set that you badly want to use ...
Music is a big continent with different landscapes and corners. Some of them I do visit frequently, some from time to time and some I know from hearsay only ...
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