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December 31, 2017 at 4:34 pm #5457
uRADMonitor
Keymaster

Your unit doesn’t have a noise sensor as I recall. This feature is being added to current A3 design, but it is still experimental.

For the CH2O, please try to approach some ethyl alcohol close to the unit, so some of the vapour would be sucked inside the detector, to see if it triggers a response.