They have portable explosives monitors, but they are max expensive. The ones I priced at work were in the 30-32 thousand dollar range.
If you can make one cheap and accurate, the world is yours. Oh, and it needs to detect everything..LOL
How much does it cost to train dogs to sniff out the materials?
Chemistry has never been my strong suit, but I think it could be done. I'm using optics as the catalyst monitor in the pot sensor. That's simple, because there's only one component being looked for, and one specific reaction.
I wonder if I could use this same approach. I'd need a spectrum analyzer in each unit, probably. Bluetooth, too. Constant streaming to a server that returns an alarm signal to the unit and forwards an alarm to TPTB. If the sensor goes offline, an alarm could be sent as well.
I don't know. Hafta think about it. It's probably WAY over my head.