Humidity Indicator Cards

Humidity indicator Cards are colour change indicators. As the humidity increases the chemically impregnated spots change from a blue colour through a lavender, to a pink colour, indicating whether or not a critical RH has been reached. Humidity Indicator Cards go hand in hand with the desiccant bags inside the Dry Shielding Bags.

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Humidity Indicator Cards change colour according to the level of humidity in the room. The cards consist of blue spots that contain certain chemicals. When the humidity increases past 30%, the spots change colour, presenting a lavender/ pink colour. The colours indicate whether or not a critical Rh has been reached. Humidity cards must be used with desiccant bags.