Hi, hopefully this is an easy question. I have been looking for this and did check the wiki (https://wiki.seeedstudio.com/Grove-Alcohol_Sensor/) and checked MQ303A.pdf as well.
The chart seen in the wiki makes sense for why we’re calculating the ratio we are (from the arduino code provided in the wiki). What I want to know is how to go from there to determining the alcohol content in the air and what the different numbers mean in terms of alcohol in the breath. Is the user sober, tipsy, drunk? I believe I saw somewhere that there wasn’t an equation to use so that makes me even more curious on how to get a value to work with for determining this, because it does say “It is suitable for making Breathalyzer”.