Most analogue hygrometers are based on a metal spring mechanism which is notoriously inaccurate. Analogue "hair" hygrometers which are based on a mechanism of a synthetic or natural hair offer superior accuracy and are the best choice.
All humidors of the adorini deluxe series as well the Elie Bleu humidors in the highest price segment are equipped with analogue hair hygrometers.
With respect to digital hygrometers, such models with capacitive sensor offer superior accuracy and a longer life time compared to basic models.