This dehumidifier from Hydrosorbent comes along with an inbuilt recharge indicator. The indicator is originally orange in color, nevertheless it turns by itself apparent when it requires a reactivation. The silica gel used in the dehumidifier incorporates no cobalt, And that's why it has no proneness to virtually any spoilage. https://dstdehumidifiers.co.uk/case-studies/desiccant-dehumidifiers-in-cold-stores/