You have a good point and I could maybe add that as a redundancy, so that the mixer stops mixing if the temperature of the mixed gasses gets too close to or exceeds combustion temperature. However, if people are going to be careless and try to mix hot gasses to make fuel, then perhaps they need to learn the hard way that we don't do that. LOL.

Just an analogy.....Yes, we could design a better propane tank that can be left inside of a hot car all day in Death Valley Nevada. And we could also design that tank to be able to be filled to 100% capacity without the need for expansion. But we don't. We assume people who handle propane have some idea of how to handle it in a safe manner.

People can just as easily not attempt to mix gasses that exceed combustion temps in the first place. If I make the script too idiot proof, then all the idiots will be spamming the comments wondering why the script doesn't work. Part of the learning process requires accidents. If people are careless or certain circumstances are allowing their gases to exceed combustion temperatures, they should probably design some kind of cooling system for their gases.

I'll think about your idea though. At the very least I could make the script so that it will stop mixing even if someone is careless and the fuel does combust, thus preventing you from wasting the remainder of your unmixed gasses.

Thanks for the feedback. I'll play around with this.