Humidity Indicators

Humidity Indicator Card

The humidity indicator spots will change from blue (dry condition) to pink (humid condition) as the relative humidity changes in the volume of air surrounding the indicator. Humidity indicator cards can be returned to a blue color by placing indicators in a sealed container with 33 grams (1 unit) of desiccant for four hours.

Peak Indicator Cards

The Maximum Humidity Indicator records relative humidity from 50 to 90% in 10% increments. The indicators are blue crystals which dissolve when exposed to the rated RH for 24 or more hours. The highest percentage spot containing dissolved solids indicates the maximum humidity reached.

The Reversible Indicator strip shows the current humidity (10 to 100%) when the package is opened, in the event that humidity rose and dropped during shipping. Read the strip at lavender between pink and blue for the current humidity.

Indicates: Irreversible, 50, 60, 70, 80, 90%RH

Reversible,10 to 100%RH

Dimensions: 4.5 x 4.5 in. (114 x 114mm)

Shelf-Life: 1 year from date of shipment in unopened can

6 months once can has been opened

Type: Proprietary salts with blue dye