Thanks to everyone for supporting this project! I'm really happy it made the top 10 and will hopefully make a difference in the world.
As I mentioned before in the project, the MQ2 sensor is great for a "proof of concept" but needs to be updated to a full sensor suite to replicate industry gas analyzers. One problem I have had is that when the sensor is flooded with a gas like LPG- it false triggers on the remaining ones whereby relaying potentially incorrect levels.
This isn't a huge deal for basic project sharing but I decided to simplify the code to a basic "Go" or "No-GO" indication. This would trigger anyone to be ready for all 3 situations if alert is indicated.
New code is added to GIT with a simple annunciation- it repeats safe if all are 0 levels and repeats "Alert" 3 times any time there is any indication of levels above zero from the sensor.
I really wish I could afford to get a proper sensor system but in the interim this is one more option to take the project forward.
I will try to do a final update video soon covering some "insider info" as to why I truly love this project and why I wish I could have used it in daily work for many years. It does indeed apply to many fields of industry and I can't believe a commercial unit like this is seemingly not yet available.