Humidity Indicator Cards

How do humidity indicator cards work?

Humidity indicator cards are impregnated with a solution of cobalt chloride that has been carefully mixed to change color from blue through various shades of magenta - red, to a pink. These cards are not precision indicators. However, they are very good at telling you the maximum possible humidity in a container. For example if all of the dots are deep blue on a card which is a 10%- 60% card than you can be assured that the humidity in that container is below 10%. This is very important for some products and household items because as long as the humidity is below 40%, basic corrosion (rust) will not occur. Neither will mildew or mold in clothing or paper products. Finally, all sophisticated electronics: video cameras, computers, SLR cameras, sophisticated instruments etc. enjoy a much longer and more reliable life if they are maintained at a very low relative humidity. For example, at the bottom of this page are cards that were developed specifically for the electronics (computer chips) industry. These companies require that the humidity in their shipping packages be below 10% and as of the guidelines established in the fall of 1999 are striving to maintain humidity below 5%.

Humonitor™ - Indicator Attachment for Flexible Packaging

This humidity indicator attachment is an invaluable tool for those who need to track the relative humidity of their products continuously. Offering real-time readings directly within the packaging, it simplifies monitoring. To utilize this device, just pierce the flexible package, and seal the insert securely by twisting and tightening the attachment. Curious about this item? Contact us for more information.

1/pack: $9.99

Quantity

Single Dot Cards - Available Now ↓

Part Number	Item	Description	Order
HIC0108BBC	1.5" x 2"	8% RH Humidity Indicator Card Single Dot (100 cards/case)	1 case: $18.55 5+ cases: $12.33/case Quantity
HIC0108	1.5" x 2"	8% RH Humidity Indicator Card Single Dot (500 cards/case)	1 case: $61.63 Quantity
637BB08/10PK	3.25" x 3.25"	8% RH Humidity Indicator Card Single Dot (10 cards/case)	1 case: $9.28 Quantity
637BB08/100PK	3.25" x 3.25"	8% RH Humidity Indicator Card Single Dot (100 cards/case)	1 case: $58.75 Quantity
637BB08	3.25" x 3.25"	8% RH Humidity Indicator Card Single Dot (500 cards/case)	1 case: $147.67 Quantity

Three Dot Cards - Available Now ↓

Part Number	Item	Description	Order
HIC031030/10PK	0.67" x 2.0"	10%, 20%, 30% 3 Spot Humidity Indicator Card Three Dot (10 cards/case)	1 case: $6.93 Quantity
HIC031030/100PK	0.67" x 2.0"	10%, 20%, 30% 3 Spot Humidity Indicator Card Three Dot (100 cards/case)	1 case: $18.98 5+ cases: $17.47/case Quantity
HIC031030	0.67" x 2.0"	10%, 20%, 30% 3 Spot Humidity Indicator Card Three Dot (500 cards/case)	1 case: $86.47 Quantity

Six Dot Cards - Available Now ↓

Part Number	Item	Description	Order
6HC106010PK	1.5" x 4.0"	10%-60% RH 6 Spot Humidity Indicator Card Six Dot (10 cards/case)	1 case: $8.10 10+ cases: $5.04/case Quantity
6HC1060	1.5" x 4.0"	10%-60% RH 6 Spot Humidity Indicator Card Six Dot (100 cards/case)	1 case: $48.30 Quantity
6HC3080/10PK	1.5" x 4.0"	30%-80% RH 6 Spot Humidity Indicator Card Six Dot (10 cards/case)	1 case: $8.10 10+ cases: $5.04/case Quantity
6HC3080	1.5" x 4.0"	30%-80% RH 6 Spot Humidity Indicator Card Six Dot (100 cards/case)	1 case: $48.30 Quantity