Cdex, Inc. (fka CDEX)

[d4diddy]

"As for items purchased from secondhand stores, Poteet said the gun could possibly detect trace amounts of drugs used by a previous owner, but those amounts probably wouldn't be enough to warrant police suspicion."

http://news.zdnet.com/2100-9596_22-6099364.html

My understanding is that the meth gun gives a red light/green light indication for the presence of meth. There is no way to calibrate the gun to give concentration levels. That would require standardized stand-off distances, background noise, drug purity... etc. These are the variables which must remain constant and can only be controlled in a pristine Valimed-like chamber. They cannot be controlled by holding a handheld device under varible conditions. NO WAY in my opinion.

So what is Poteet saying:

but those amounts probably wouldn't be enough to warrant police suspicion."