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Thread: Passenger with broken wrist denied boarding due to "explosive residue"
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Old Feb 13, 2018, 3:54 pm
  #14  
petaluma1
 
Join Date: Aug 2012
Posts: 3,526
Originally Posted by YadiMolina
Can anyone speak to the quantitative abilities of these screening devices? Can they detect "magnitudes" of anything? Or is it just detected / not detected? Can they differentiate between a trace detection, or a pure explosive material? (I'm probably answering my own question here.)
I think it's detected/not detected. Interesting to note that the TSA's ETD machines alarm on all sorts of things, but their explosive sniffing dogs don't. The dogs seem to be looking for "complete" explosives while the ETD machines look for components of explosives.
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