Humidity Indicator Card
Product Category: Desiccant-Related Products
Key Attributes:
- Types: Cobalt-containing humidity indicator card, Cobalt-free humidity indicator card
- Specifications: 3/4/6/7/10(point)
- Packaging: 250pcs/can, 12 cans/box
- Material: Sulfur-free paper
- Printing: English
Product Quotation:
$: Free samples available, detailed pricing upon consultation
Humidity Indicator Card
Also known as a humidity card or moisture alert label, the Humidity Indicator Card is used to monitor humidity levels within sealed environments. It serves as an environmental measurement product that detects whether the relative humidity inside sealed packaging remains within a safe range. The percentage values printed above or beside each circle correspond to the relative humidity level indicated by that circle.
Most electronic components, precision optical parts, and other high-end electronic devices and instruments are susceptible to moisture damage, which can lead to corrosion, reduced sensitivity, or even irreversible failure. To protect products from moisture damage during storage and transit, moisture barrier packaging is often employed during the final packaging stages of both finished goods and semi-finished products. The Humidity Indicator Card offers a convenient and economical way to monitor whether humidity remains within the controlled range. When the sealed package is opened, the color change displayed on the card provides immediate visual data—indicating whether the humidity inside the package stayed within specified limits and indirectly reflecting whether the desiccant inside effectively absorbed moisture.
Manufacturing Standards:
- 2004/73/EC (EU Environmental Regulation)
- GJB 2494-95 (Military Standard of the People’s Republic of China)
- MIL-I-8835A (U.S. Military Packaging Standard)
- JEDEC (Standard of the Joint Electron Device Engineering Council)
Cobalt-Based Humidity Indicator Card (Non-compliant with EU standards, not environmentally friendly):
This card allows for intuitive humidity assessment through a clear color change. The operating principle is based on the color transition of cobalt chloride upon moisture absorption. The complex [Co(H₂O)₄Cl₂] is blue, while [Co(H₂O)₆]²⁺ is pink. When dry, the card appears blue. If the circle changes from blue to pink, it indicates that the humidity inside the packaging has reached or exceeded the relative humidity value marked for that circle.
Cobalt-Free Humidity Indicator Card:
Free of cobalt dichloride, this card is a healthier and eco-friendly alternative. It provides a simple, low-cost, and safe method for monitoring ambient humidity levels. Users can quickly determine the humidity inside product packaging and verify the effectiveness of the desiccant by observing the color change on the card. If the humidity in the package meets or exceeds the value indicated by a specific dot, that dot will change from its dry color to its moist color, offering an easy way to check whether the desiccant is still performing effectively.
Step 1: Place the product to be stored into a sealed container.
Step 2: Put the desiccant and Humidity Indicator Card together into the packaging container.
Step 3: Seal the container.
Step 4: Replace the desiccant promptly when the dots on the Humidity Indicator Card change color.
Suitable for use in semiconductors, ICs/integrated circuits/PCBs, electronic component packaging, sensitive assemblies, organic materials, military supplies, optical instruments, metal materials, composite materials, pharmaceuticals, warehousing, and vacuum-sealed packaging of various products.
About Chunwang:
With 27 years of professional expertise, our company specializes in manufacturing a comprehensive range of desiccants and related moisture control products. We offer a wide selection of standard specifications and packaging materials, with ready-to-ship availability for routine orders—no lead time required. We also support in-depth customization to meet your unique needs. Beyond simply producing and selling products, we provide scientific moisture protection solutions to ensure your products remain safe from humidity damage.
Learn More About Chunwang Group >>
Chunwang Advantages:
- Established in 1998, with over 20 years of expertise in R&D and production of desiccants and oxygen absorbers.
- Stock Code: 831880; Stock Abbreviation: Chunwang New Materials.
- Three production bases in Shenzhen, Dongguan, and Anhui, totaling 60,000 m².
- Drafting Unit for the Chinese industry standard BB∕T 0049-2021 (Desiccants for Packaging).
- Drafting Unit for GB/T 41896-2022 (Oxygen Absorbers for Food) and GB/T 41897-2022 (Desiccants for Food).
- Certifications: ISO, BSCI, GMP, High-Tech Enterprise, Specialized & Innovative SME.
- Compliance: RoHS, REACH, TSCA; completed FDA DMF filing.
- National Pharmaceutical Packaging Material Registration No.: B20190000354.
Our company possesses significant technical expertise and industry-leading professional capabilities. Our products incorporate innovative technologies, backed by extensive experience in R&D, stringent quality control, and practical market applications. We are committed to providing customers with efficient, safe, and environmentally sustainable mold and moisture prevention solutions.
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Humidity Indicator Card Overview:
Three-point humidity indicator card
Four-point humidity indicator card
Six-point humidity indicator card
Seven-point humidity indicator card
Ten-point humidity indicator card
Related Link: Product Test Reports>>
Related Link: Production Environment>>
Extensive Experience:
With over 20 years of deep industry experience, we have provided leading moisture-proof solutions and products to numerous renowned domestic and international enterprises. We now bring this accumulated expertise directly to your products and production lines, helping you to: Significantly reduce moisture-related damage and guarantee product quality. Safeguard brand reputation to earn lasting market and customer trust.
Our team is here for you (7X24):
We value every single relationship. Big or small, your business is important to us. You can count on our heartfelt enthusiasm and full support whenever you reach out.
Ms. Liu
Gold Medal Sales Rep
Ms. Zhou
Gold Medal Sales Rep
Ms. Zeng
Gold Medal Customer Service
Ms. Lan
Gold Medal Customer Service