An integral part of a complete moisture barrier packaging assembly is the Humidity Indicator Card. High relative humidity can cause significant, possibly irreparable damage to sensitive equipment, supplies, and products. To ensure dehydration measures work, humidity indicator cards measure the relative humidity (RH) inside sealed packages to allow immediate visual inspection of whether it has sustained unsafe humidity levels.

The Cobalt-free HIC contains chemically impregnated, humidity sensitive, indicating spots that will change color with moisture. The comparison bar is used to determine relative humidity of air. Select the indicating spot that most closely matches the color described on the cards. The measured relative humidity is the percentage indicated on the matching spot. The chemical reaction of the indicating spots is completely reversible; the spots will continue to change color as the moisture levels change. Our Cobalt-free HICs’ chemistry formula involves a sulfur compound, but no cobalt compounds. 

This card is free of cobalt, a chemical that has classification and labeling requirements under European Chemical Agency (ECHA) REACH directives. Desco Cobalt-free Humidity Indicator Cards chemistry formula involves a sulfur compound, but no cobalt compounds.

Cobalt-Free Humidity Monitor cards are sold in cans. Cobalt-Free Humidity Indicator Cards should be inserted and sealed within a Moisture Barrier Bag with the desiccant packs.

Note: The complete dry package concept of packaging for electronics requires three elements:

• Moisture Barrier Bags – to protect
• Desiccants – to absorb moisture
• Humidity Indicator Cards – to monitor performance