Prof. Feuchtemessgerät ?

Ich habe da jetzt schon ein bisschen in deinen Thread reingelesen, die Salz-Methode scheint wirklich nur eine Annäherung mir viel Fehlerpotential zu sein.

Das Boveda Butler mit Calibration-Kit habe ich bereits geordert, gut zu hören, dass es nach deiner langen Erfahrung wohl für uns da nichts optimaleres gibt. 

Thanks for your response. I am sorry to hear you are not satisfied with the Butlers accuracy. Unfortunately, after calibration, the Butler has an accuracy of +/-2.4%, so there isn't anything we can do to make that more accurate. If you would like, we do offer a manual calibration/offset adjustment feature, that you are more than welcome to use if you would like. You can find this by going to calibration and then clicking customize. From here you can adjust your 75% or high point calibration up or down to your desired level. Again, the actual sensor on the Butler has an accuracy of +/-2.4%, so there aren't any adjustments that can be made to improve the sensors accuracy any further, other than adjusting the manual calibration/offset if you would like.

 und so zeigt es sich auch, aktuelle Abeweichung nach 2 Kalibrierungen, 2%+