Has anyone tried testing?

Don't know. For the price of 6.5 lab tests.....If the thing would work for a few years - I would be very pleased....
They do give you a free lab test so you can compare it to their units results....

Might as well call and talk to someone about it....
 
from their website

The vapors cause swelling which induce resistance changes. MyDx is able to quantify THC to within 20% of conventional gas chromatography instruments. Our subsequent generation devices and sensors will target a marginal error rate within 5% of GC values.
 
Yeah, I might try it. I think it would be cool to have that kind of knowledge about what you grow.
 
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