My guess is that they don't want to show a demo because they don't have a solution for the reader. We know they have a handheld spectrometer because we've seen it in one of their pictures. Perhaps that's what they have been using for proof-of-concept? That's a $2,000+ piece of stand-alone equipment however which doesn't lend itself to widespread adoption of the technology.
QTMM presentation. Watch the following from min: 21:55 to 24:00. They tested this technology with a fortune 100 oil & gas company. Results were "extremely exciting"
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