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Description | Part Number | Quantity | Price | ||
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10-60% 6 spot humidity indicator card 1.5" x 4.0" |
6HC106010PK | 10 | $6.50 | |
6HC1060 | 100 | $38.80 | |||
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30-80% 6 spot humidity indicator card 1.5" x 4.0" |
6HC3080/10P | 10 | $6.50 | |
6HC3080/100P | 100 | $38.80 |
Description | Part Number | Quantity | Price | ||
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8% Single Dot humidity indicator card 1.5" x 2.0" |
HIC0108/100P | 100 | $14.90 | |
HIC0108 | 500 | $49.50 | |||
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10% 20% 30% 3 dot humidity indicator card 0.67" x 2.0" |
HIC031030/100P | 100 | $15.20 | |
HIC031030/10PK | 10 | $5.50 | |||
HIC031030 | 500 | $69.50 |
Description | Part Number | Quantity | Price | ||
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8% Single Dot humidity indicator card 3.25" x 3.25" |
637BB08/10P | 10 | $7.45 | |
637BB08/100PK | 100 | $47.25 | |||
637BB08/500PK | 500 | $118.80 |
Keep in mind that these cards will only indicate the relative humidity. If you want to keep the humidity low in your package whether storing electronics, a wedding dress heirloom, old photographs, or personal items, you will need a desiccant packet to do this.
HIC card on the top is outside the bag and shows the humidity is more than 50%. The card sealed in the clear bag along with small packets shows the humidity inside the bag is lower than 10% (all spots are blue).
This card is reading that the humidity is certainly above 10%, probably around 20%
This card is reading that the humidity is somewhere around 50%
Humidity Indicator Cards:
The HIC should comply with MIL-I-8835 and, at a minimum, have three color dots with sensitivity values of 30% RH, 40% RH, and 50% RH.
Proper packaging of the lead-free compatible PCB is critical. The packaging system must be carefully developed by the PCB fabricator to protect the PCB from atmospheric moisture that may enter the packaging materials by diffusion. The packaging system should be developed to offer a shelf life of 12 months at ≤40°C and 90% RH.
Desiccant:PCB's should be vacuum packed in a width adequate desiccant and humidity indicator card.
To determine the proper quantity of desiccant ´units´ to be used in the bag, use the following formula.
Units=(0.231 x Bag Surface Area x Bag WVTR x Months) / Moisture Capacity
Units=(0.231 x 160 in² x 0.02 WVTR x 13 months) / (6.2g / unit)
Units = 1.4 desiccants ≈ 2 units
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