Humidity Indicator Cards

Humonitor Humidity Indicator Cards reveal at a glance if moisture within sealed containers or closed spaces is at an acceptable level. Humonitor Humidity Indicating Cards help monitor desiccant activity and are ideal for use with desiccants in any application where moisture control is critical. Any color change from blue to pink (cobalt cards) or brown to green (cobalt-free cards) indicates an unsealed container and/or damaging level of humidity. Cobalt-free Humonitor Humidity Indicator Cards do not contain heavy metals.