Humidity Cards


Humidity Card indicator scales provide a quick and inexpensive means of checking relative humidity levels of your storage or display area.

As humidity changes, the chemically impregnated spots change from blue (dry) to lavender (normal) to pink (humid);

The standard humidity card indicates the current humidity level by reading to the first blue (dry) section. If higher level of accuracy is required we recommend our digital thermohygrometer.

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