How does Cigar Oasis work?
Accurate sensor measures the humidity and when it is less than 70% it starts a fan that draws air from inside the humidor, runs it through the water cartridge, which humidifies the air and pushes it back into the humidor. When the humidity in the humidor reaches 70% the fan stops. Typically the fan goes on every time you open the humidor and from loss of humidity to the outside ambient through to leaks in the seal of the humidor.