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Humidity Indicator Card

Your Professional Humidity Indicator Card Supplier

 

Dongguan Weiyi Electronic Technology Co., Ltd.is a specialized enterprise engaged in the production and sales of humidity indicator cards, desiccants, and moisture-proof & anti-static packaging solutions. Our products are widely used in electronic components, PCBs, automotive, food, pharmaceuticals, optical & optoelectronic products, aerospace, chemical industries, and more.

 

 
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Why Choose Us

 

Our Certificate

We ISO9001 and SGS certified products compliant with RoHS and REACH international environmental standards.

Custom Solutions Available

Providing over 200 humidity indicator card designs with professional customization services based on customer requirements.

Extensive Industry Experience

Over 18 years of expertise in humidity indicator cards and desiccant manufacturing, specializing in moisture-proof and anti-static packaging solutions.

Strong Manufacturing Capacity

10000㎡ modern production facility with a daily output of 1 million humidity indicator cards for stable and fast delivery.

 

Advantages of Humidity Indicator Card

 

Cost-Effective Solution

An affordable solution for monitoring humidity levels, eliminating the need for complex or expensive equipment.

01

Ease of Use

Designed for simplicity, HICs require no specialised training, making them accessible to users across various industries.

02

Instant Feedback

These cards offer immediate visual confirmation of humidity conditions, enabling quick and informed decisions.

03

Customisable Formats

With a wide range of formats and configurations available, HICs can be adapted to suit diverse applications and industry requirements.

04

Versatile Availability

Their broad availability ensures they can meet the specific needs of moisture-sensitive operations in sectors like electronics, pharmaceuticals, and aerospace.

05

 

Specification

 

Item

Details

Product Name

Cobalt-containing HIC102 Humidity Indicator Card

Physical Form

Card-shaped

Humidity Level

30%

Color

Blue (Original State)

Single Card Dimension

45mm * 55mm

Product Applications

Semiconductors, ICs, PCBs, optoelectronic components, etc.

Product Packaging

200 cards per can

 

Three-Spot Cobalt-Free Humidity Indicator Card

 

Types of Humidity Indicator Card

Humidity indicator card is divided into two types, One is humidity indicator card with cobalt, another one is humidity indicator card without cobalt. The principle of discoloration is as follows:

 

HIC with cobalt’s color-change principle is according to the principle of color discoloration after chlorinated cobalt absorbs water, [Co(H20)4Cl2] is blue [Co(H2O)6]2+is pink，HIC is blue [Co(H20)4Cl2] when drying, After absorber water is changed from blue to pink [Co(H2O)6]2+. If the color of the circle changes from blue to pink, it means that humidity in the packaging is achieved or exceeded the relative humidity value of the circle.

 

Cobalt free HIC not contain cobalt chloride, discoloration uses other more environmentally friendly chemical substances; There are several kinds, such as blue change to pink, blue change to purple, yellow change to green, yellow change to blue, brown change to blue, brown change to green. Also, if the color of the circle changes from dry color to wet color, it means that humidity in the packaging is achieved or exceeded the relative humidity value of the circle.

 

 

How Does a Humidity Indicator Card Work

HICs work through a simple yet efficient process: the card’s spots contain a chemical solution that reacts with moisture. The most common solution is cobalt chloride, which changes color in response to varying levels of humidity. When the card is first placed inside packaging, the indicator spots are blue, indicating a dry environment. If the relative humidity inside the package rises, the spots will gradually shift to purple and eventually pink as the moisture content increases. The more humid the environment, the more pronounced the color change.

 

The primary function of these cards is not to provide an exact percentage of humidity but to give a quick indication of whether the humidity inside a package has reached a potentially harmful level. For example, if a three-spot card shows pink in the 40% or 50% spot, it signals that the moisture level has exceeded safe thresholds and further action, such as replacing desiccants, may be necessary.

6-Spotcobalt Dichloride Free Humidity Indicator Card

 

Proper Storage Conditions of Humidity Indicator Card

Controlled Environment

Store HICs in a dry, temperature-controlled environment. Excessive moisture and extreme temperatures can degrade the chemicals used in the indicator spots.

 

Sealed Packaging

Keep HICs in their original, sealed packaging until they are ready to be used. The packaging is designed to protect the cards from ambient humidity and contamination.

Desiccants

Store HICs with a desiccant pack inside an airtight container.

Away from Direct Sunlight

Avoid exposing HICs to direct sunlight or other sources of UV radiation.

Temperature Range

Store HICs within a specific temperature range advised by the. This is typically between 15°C and 25°C (59°F and 77°F).

 

 
Application of Humidity Indicator Card
 
01/

Electronics Manufacturing
Sensitive components like microchips and circuit boards are highly susceptible to moisture, which can cause corrosion and performance degradation. HICs are widely used in packaging to ensure that electronics are kept in a dry environment.

02/

Pharmaceuticals
Medicines and medical devices require strict humidity control to maintain their effectiveness and safety. HICs help pharmaceutical companies ensure that their products are stored in the correct conditions during transit and storage.

03/

Food Packaging
In the food industry, moisture control is essential to preserve the quality and safety of products. Dry food items, such as cereals, grains, and powdered products, can spoil or become contaminated if exposed to excessive moisture. HICs, used alongside desiccants, help maintain ideal conditions to prevent spoilage.

04/

Military and Aerospace
High-precision equipment in the military and aerospace sectors often requires stringent environmental controls. HICs help ensure that sensitive equipment and materials are protected from moisture, preventing damage to valuable assets.

 

FAQ

 

Q: How to use a humidity indicator card?

A: Select the indicating spot that most closely matches the color of the comparison bar. 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.

Q: What is the purpose of the humidity indicator card?

A: Humidity indicator cards (HICs) are small, paper-based devices that change color to indicate the relative humidity (RH) in a specific environment. Typically, these cards are packaged with moisture-sensitive items to provide a quick and easy assessment of whether the humidity level is within acceptable limits.

Q: What is the humidity identifier card?

A: A humidity indicator card (HIC) is a card on which a moisture-sensitive chemical is impregnated such that it will change color when the indicated relative humidity (RH) is exceeded.

Q: How long do humidity indicator cards last?

A: The shelf life for humidity indicator cards varies depending on the card. However, most humidity indicator cards have a 3-year shelf life.

Q: Are humidity indicator cards reusable?

A: The humidity card itself is reusable. When the humidity level is low, the dots will change from pink to blue again. With long use, the color of the dots may faint. Then, you can replace the card.

As one of the most experienced humidity indicator card manufacturers and suppliers in China, we have world-leading production equipment and strong manufacturing capabilities. Please feel free to wholesale high quality humidity indicator card made in China here from our factory. Customized orders are welcome.