Hi huytyskland,
For your test "The next day, departing from this calibration state, we tried to get coherent gas measurements of known gas concentrations, using 100 ppm acetone vapor in a closed bottle as a reference gas. Unfortunately, this does not produce any coherent results across different sensor devices. Device 1 may produce a VOC reading of 4.13 ppm, Device 2 shows something in the order of 30 PPM, and device 3 shoots up all the way to a reading of 1000 ppm (the maximum value).", how about the accuracy value duaring that time?
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