Originally Posted by
BubbaLoop
These are not pH strips. They claim them to be similar to pH strips, and to detect "explosives" without immersion into the liquid, just by being waved above it. That is the precise reason I wanted to try to find out more about them. Seems pretty magical to me...
I don't think it's as magical as logic would make us believe. They've done dry vapor tests since the 60s when dealing with chemicals, acids, all the nasty stuff that would explode.