Humidity Indicator Cards

How do humidity indicator cards work?

uniquely shaped pouches

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%.


Single Dot Cards - Available Now ↓

Part Number Item Description Order
HIC0108BBC 1.5" x 2"
single dot humidity indicator card
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"
single dot humidity indicator card
8% RH Humidity Indicator Card
Single Dot
(500 cards/case)
1 case: $61.63

Quantity
637BB08/10PK 3.25" x 3.25"
single dot humidity indicator card
8% RH Humidity Indicator Card
Single Dot
(10 cards/case)
1 case: $9.28

Quantity
637BB08/100PK 3.25" x 3.25"
single dot humidity indicator card
8% RH Humidity Indicator Card
Single Dot
(100 cards/case)
1 case: $58.75

Quantity
637BB08 3.25" x 3.25"
single dot humidity indicator card
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"
three dot humidity indicator card
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"
three dot humidity indicator card
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"
three dot humidity indicator card
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"
six dot humidity indicator card
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"
six dot humidity indicator card
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"
six dot humidity indicator card
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"
six dot humidity indicator card
30%-80% RH 6 Spot Humidity Indicator Card
Six Dot
(100 cards/case)
1 case: $48.30

Quantity