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%.
| 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 |
| HIC0108 | 1.5" x 2"
|
8% RH Humidity Indicator Card Single Dot (500 cards/case) |
1 case: $61.63 |
| 637BB08/10PK | 3.25" x 3.25"
|
8% RH Humidity Indicator Card Single Dot (10 cards/case) |
1 case: $9.28 |
| 637BB08/100PK | 3.25" x 3.25"
|
8% RH Humidity Indicator Card Single Dot (100 cards/case) |
1 case: $58.75 |
| 637BB08 | 3.25" x 3.25"
|
8% RH Humidity Indicator Card Single Dot (500 cards/case) |
1 case: $147.67 |
| 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 |
| 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 |
| HIC031030 | 0.67" x 2.0"
|
10%, 20%, 30% 3 Spot Humidity Indicator Card Three Dot (500 cards/case) |
1 case: $86.47 |
| 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 |
| 6HC1060 | 1.5" x 4.0"
|
10%-60% RH 6 Spot Humidity Indicator Card Six Dot (100 cards/case) |
1 case: $48.30 |
| 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 |
| 6HC3080 | 1.5" x 4.0"
|
30%-80% RH 6 Spot Humidity Indicator Card Six Dot (100 cards/case) |
1 case: $48.30 |