You could very easily read the best hygrometers without the need of opening the humidor, avoiding any potential for upsetting the inside climate. In comparison with analogue meters, electronic hygrometers are routinely more accurate and easier to study. So whilst selecting a Humidor in your case, check for its hygrometer. https://greenecodream.com/cigar-humidor-buying-tips-what-to-know-before-you-invest/