This dehumidifier from Hydrosorbent comes with an inbuilt recharge indicator. The indicator is originally orange in coloration, but it surely turns by itself distinct when it demands a reactivation. They take up extra humidity through the atmosphere by extracting drinking water molecules into a desiccant content which attracts drinking water. https://dstdehumidifiers.co.uk/case-studies/desiccant-dehumidifiers-in-cold-stores/