Cdex, Inc. (fka CDEX)

[d4diddy]

Paige, what is the significants whether the container (e.g., cuvette) is open or closed?

"After you put the sample in... it is then a closed container..Right?"

Yep, pipette a sample in the cuvette and put on the stopper. Place it in the port and hit the button. UV light shines on the cuvette irradiating the sample resulting in a signature.

If the sample volume/UV transmission length through the sample is known, the concentration can also be determined if it has been calibrated against known concentration standards.

"What makes this any different than putting explosives or chemicals in a container and closing the lid and then shipping it to the US? I don't understand the difference."

UV won't penetrate the box. Also concentration cannot be determined like Valimed since there is no way to an open air detector can have a controlled environment to calibrate against known concentration standards.

With an open air detector one would speak of it's sensitivity limit or how small a trace the device will detect at a given confidence level. The meth gun and the FirstDefender cannot determine concentration through a bottle.