text: I don’t think they put on the particulars out there. When I was trained to use/build and train for them it was pretty hush hush technology and I assume it changed since then. But when I fly I still see the old machines I put in some airports after 9/11 . Sometimes I talk with the operators about the machine and they get uneasy until I explain how I know the machine. Anyway that’s what I suspect it is. No it is probably been built specifically for the fed . They units are small themselves and can be put into anything to blend it if needed .